一、解方程专题7+=19X+120=17658+X=90X+150 =29079.4+X=95.52X+55=1297 X=63X×9=4.54.4X=444X × 4.5=90X ×5=100 6.2X=124X-6=19X-3.3=8.9X-25.8=95.4X-54.3 =100X-77=275X-77=144X ÷7=9X÷4.4=10X÷78=10.5X÷2.5=100X÷3=33.3X÷2.2 =89-X=4.573.2-X=52.587-X=2266-X =32.377-X=21.999-X=61.9 3.3÷X=0.3 8.8÷X=4.49÷X=0.037÷X=0.00156÷X=539÷X =33×(X-4)=46(８+X)÷5=15(X+5) ÷3=1615÷(X+0.5)=1.512X+8X=4012X-8X=4012X+X=26X+ 0.5X=6X-0.2X=32 1.3X+X=263X+5X=4814X-8X=126×5+2X=4420X-50=5028+6X=8832-22X=1024-3X=310X×（5+1）=6099X=100-X X+3=18X-6=1256-2X=204X+2=6X+3 2=763X+6=1816+8X=402X-8=84X-3×9=298X-3X=105X-6×5=42X+5=72X+3=10X-0.8X=612X+8X=4.87(X-2)=494×8+ 2X=36(X-2)÷3=7X÷5+9=21(200-X)÷5=3048-27 +5X=313X-8=163X+9=27 5.3+7X=7.43X÷5 =4.85×3-X=840-8X=5X÷5=215X+25 =100X+15=302X+8=2020-2X=62X+ 9=3135-5X=105（X-6）=2010（9-X）=206(X-3)=123(X-9)=3354-X=247X=49126÷X=4212÷X=0.3 6.75-X=1.68 0.7X=4.2 0.7X+6×5=37(10X-25)÷5=15 2X-7.5=8.5 7.9X-X=8.97 13(X+5)=1692X+8=16 X÷5=10 X+7X=8 9X-3X=66X-8=4 5X+X=9 X÷5=10 X+7X=8X-8=6X 4÷5X=20 2X-6=12 2X+8=169X-3X=6 6X-8=4 5X+X=9 X-8=6 X4÷5X=20 2X-6=12 1÷2X-8=4 X-5÷6=77X+7=14 6X-6=0 5X+6=11 2X-8=103X+7=28 3X-7=26 9X-X=16 24X+X=506÷7X-8=4 3X-8=30 6X+6=12 3X-3=15X-3X=4 2X+16=19 5X+8=19 14-6X=815+6X=27 5-8X=4 7X+8=15 7X+7=146X-6=0 5X+6=11 2X-8=10 2X-8=4X-5÷6=7 3X+7=28 3X-7=26 9X-X=1624X+X=50 6÷7X-8=4 3X-8=30 6X+6=123X-3=1 5X-3X=4 2X+16=19 5X+8=1914-6X=8 15+6X=27 5-8X=4 7X+8=159-2X=1 4+5X=9 10-X=8 8X+9=179+6X=14 X+9X=4+7 2X+9=17 8-4X=66X-7=12 7X-9=8 X-56=1 8-7X=1X-30=12 6X-21=21 6X-3=6 9X=184X-18=13 5X+9=11 6-2X=11 26×1.5= 2XX+4+8=23 7X-12=8 X-5.7=2.15 5X-2X=189.25-X=0.403 16.9÷X=0. 3 X÷0.5=2.6 X+13=333 -5X=80 1.8- 6X=54 6.7X-60.3=6.7 9 +4X =400.2X-0.4+0.5=3.7 9.4X-0.4X=16.2 12 -4X=20 12X+34X=118X-14 X= 12 23 X-5×14 = 14 12 +34 X=56 22-14 X= 1223 X-14 X= 14 X+14 X= 65 23 X=14 X +14 30X-12X-14X=15X-2X=30 89X-43X=9.2 5X-45=100 40X+61=223.1.2X-0.5X=6.3 23.4=2X=56 4X-X=48.6 247X+114=3771X+3=124 35X+103=171 239X+51=119 187X+255=67135X+203=15 83X+151=219 31X+99=167 137X+43=111235X+47=115 183X+251=63 131X+199=11 79X+147=215.79X+199=116 179X+247=59 127X+195=7 74X+142=21022X+90=158 226X+38=106 174X+242=54 122X+190=270X+=206 71X+191=107 128X+34=102 170X+238=50118X+=254 163X+24=190 198X+78=93 57X+172=7866X+134=202 14X+82=150 218X+30=98.166X+234=46146X+214=26 94X+162=230 42X+110=178 42X+162=79100X+6=74 142X+210=22 90X+158=226 38X+106=174242X+54=122 239X+100=10 17X+153=169 133X+248=154221X+33=101 222X+86=2 23X+185=253 65X+133=20113X+81=149 217X+29=97 218X+82=254 19X+181=24961X+129=197 9X+77=145 6X+123=33 41X+177=193156X+15=177 245X+57=125 245X+110=26 47X+209=2189X+157=225 37X+105=173 37X+157=74 95X+1=69137X+205=17 134X+251=161 169X+48=64 28X+143=49169X+33=206 227X+133=201 13X+81=149 217X+29=97214X+74=240 248X+128=144 107X+222=128 249X+113=2950X+212=24 145X+9=181 202X+108=176 244X+56=124241X+102=12 20X+156=172 135X+250=156 20X+141=5778X+240=52 120X+188=256 120X+241=157 178X+84=15213X+130=40 48X+184=199 163X+22=184 48X+168=85106X+12=80 197X+58=224 232X+112=127 91X+206=112232X+96=13 34X+196=8 128X+248=165 186X+92=16021X+=48 55X+191=207 171X+30=192 56X+176=92113X+19=87 208X+72=244 9X+171=239 100X+217=127135X+15=31 47X+214=224 245X+151=219 80X+197=107115X+251=11 230X+89=251 115X+236=152 173X+79=14711X+132=48 69X+231=43 160X+21=187 195X+75=90106X+17=28 49X+211=23 143X+7= 250X+205=115123X+3=18 34X+201=212 233X+=207 68X+185=95103X+238=254 14X+181=192 213X+119=187 51X+171=88158X+112=22 30X+166=182 198X+109=119 140X+46=114235X+99=15 85X+40=206 214X+94=110 126X+37=47117X+72=238 246X+126=142 157X+69=79 100X+6=74194X+59=231 (0.5+X)+X=9.8÷2 2(X+X+0.5)=9.8 25000+X=6X450+5X+X=3200 X-0.8X=6 12X-8X=4.8 1.2X=81.6X+5.6=9.4 X-0.7X=3.6 91÷X =1.3 X+8.3=10.715X =3 3X-8=16 7(X-2)=2X+3 3X+9=2718(X-2)=270 12X=300-4X 7X+5.3=7.4 3X÷5=4.830÷X+25=85 1.4×8-2X=6 6X-12.8×3=0.06 410-3X=170X+2X+18=78 (200-X)÷5=30 3(X+0.5)=21 0.5X+8=436X-3X=18 1.5X+18=3X 0.273÷X=0.35 (X-140)÷70=41.8X=0.972 X÷0.756=90 9X-40=5 X÷5+9=2148-27+5X=31 10.5+X+21=56 0.1(X+6)=3.3×0.4 4(X-5.6)=1.67(6.5+X)=87.5 (27.5-3.5)÷X=4 2(X+X+0.5)=9.8 X-0.7X=3.612X-8X=4.8 7.5*2X=15 1.2X=81.6 X+5.6=9.491÷X =1.3 X+8.3=10.7 15X =3 3X-8=163X+9=27 8(X-2) =270 7X+5.3=7.4 3X÷5=4.830÷X+25=85 1.4×8-2X=6 6X-12.8×3=0.06 410-3X=1703(X+0.5)=21 0.5X+8=43 6X-3X=18 1.5X+18=3X.5×3-X÷2=8 0.273÷X=0.35 1.8X=0.972 X÷0.756=909X-40=5 X÷5+9=21 48-27+5X=31 10.5+X+21=56X+2X+18=78 (200-X) ÷5=30 (X-140)÷70=4 0.1(X+6)=3.3×0.44(X-5.6)=1.6 7(6.5+X)=87.5 (27.5-3.5)÷X=4 X+19.8=25.85.6X=33.6 9.8-X=3.8 75.6÷X=12.65(X+8)=102 X+3X+10=70 3(X+3)=50-X+3 5X+15=603.5-5X=2 0.3×7+4X=12.5 X÷1.5-1.25=0.75 4X-1.3×6=2.620-9X=1.2×6.25 (X-3) ÷2=7.5 6X+12.8=15.8 150×2+3X=6902X-20=4 3X+6=18 2(2.8+X) =10.43X=X+100 X+4.8=7.2 6X+18=48 3(X+2.1)=10.512X-9X=8.7 13(X+5)=169 2X-97=34.2 3.4X-48=26.842X+25X=134 1.5(X+1.6)=3.6 2(X-3)=5.8 65X+7=429X+4×2.5=91 4.2 X+2.5X=134 10.5X+6.5X=51.89X-43X=9.25X-45=100 1.2X-0.5X=6.3 23.4=2X=56 4X-X=48.64.5X-X=28 X-5.7=2.15 5X-2X=18 3X+0.7=53.5×2=4.2+X 26×1.5=2X+10 0.5×16-16×0.2=4X .25-X=0.40316.9÷X=0. 3 23X=14X+14 X+14X=653-5X=801.8 +6X=54 6.7X-60.3=6.7 9+4X =40 2X+8=1623X-14X=14 X+7X=8 9X-3X=6 6X-8=45X+X=9 X-8=6X 4/5X=20 2X-6=127X+7=14 6X-6=0 5X+6=11 2X-8=103X+7=28 3X-7=26 9X-X=16 24X+X=503X-8=30 6X+6=12 3X-3=1 5X-3X=42X+16=19 5X+8=19 14-6X=8 15+6X=275-8X=4 7X+8=15 9-2X=1 4+5X=910-X=8 8X+9=17 9+6X=14 2X+9=178-4X=6 6X-7=12 7X-9=8 X-56=18-7X=1 X-30=12 6X-21=21 6X-3=69X=18 4X-18=13 5X+9=11 6-2X=11X+4+8=23 7X-12=8 X-5.7=2.15 5X-2X=183X 0.7=5 3.5×2= 4.2 X 26×1.5= 2X 9.25-X=0.40316.9÷X=0.3 X÷0.5=2.6 3-5X=80 1.8-6X=546.7X-60.3=6.7 9+4X=40 0.2X-0.4+0.5=3.7 12-4X=209.4X-0.4X=16.2 12X＋34X=46 18X-14X=12 23 X-5×14=1412＋34X=56 22-14X=12 X-0.8X=612x-8x=4.8二、小数一步加、减法应用题1、一本数学读物6.25元，一本语文读物5.86元。