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1、.精选范本 X-2/7X=3/4 70%X+20%X=3.625%+10X=4/5X-15%X=68X+3/8 X=1215X-35/21=5/116X+5=13.4X(6/35)=(26/45)(13/25)2(x-0.6)=4(0.5+x)+x=9.822(X+X+0.5)=9.825000+x=6x3200=450+5X+XX-0.8X=612x-8x=4.87.5*2X=151.2x=81.6x+5.6=9.452-x=1591x=1.3X+8.3=10.715x=33x-8=167(x-2)=2x+33x+9=2718(x-2)=27012x=300-4x7x+5.3=7.43x5=
2、4.830 x+25=851.48-2x=66x-12.8 3=0.06410-3x=1703(x+0.5)=210.5x+8=43.精选范本6x-3x=18(200-x)5=30(x-140)70=40.1(x+6)=3.30.44(x-5.6)=1.67(6.5+x)=87.5(27.5-3.5)x=43X-(1/2+1/4)=7/12 6.6-5X=3/4-4X 1.1X+2.2=5.5-3.3X(0.5+x)+x=9.82 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8X=6 12x-8x=4.8 7.5*2X=15 1.2x=81.6 x+
3、5.6=9.4 52x 15 91x 1.3 X+8.3=10.7 15x 3 3x816 7(x-2)=2x+3 3x+9=2718(x-2)=270 12x=300-4x 7x+5.3=7.4 3x5=4.8 30 x+25=85 1.4 8-2x=6 6x-12.8 3=0.06 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 53-x2=8 0.273 x=0.35 1.8x=0.972 x0.756=909x-40=5.精选范本x5+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78(200-x)
4、5=30(x-140)70=4 0.1(x+6)=3.30.4 4(x-5.6)=1.6 7(6.5+x)=87.5(27.5-3.5)x=4 x+19.8=25.8 5.6x=33.6 9.8-x=3.8 75.6 x=12.6 5x+12.5=32.3 5(x+8)=102 x+3x+10=70 3(x+3)=50-x+3 5x+15=60 3.5-5x=2 0.3 7+4x=12.5 x1.5-1.25=0.75 4x-1.3 6=2.6 20-9x=1.2 6.25 6x+12.8=15.8 1502+3x=690 2x-20=4 3x+6=18 2(2.8+x)=10.4(x-3)2
5、=7.5 13.2x+9x=33.3 3x=x+100 x+4.8=7.2 6x+18=48 3(x+2.1)=10.5 12x-9x=8.7 13(x+5)=169 2x-97=34.2 3.4x-48=26.8 42x+25x=134 1.5(x+1.6)=3.6 2(x-3)=5.8 65x+7=42 9x+4 2.5 91.精选范本4.2 x+2.5x134 10.5x+6.5x=51 89x-43x=9.2 5x-45=100 1.2x-0.5x=6.3 23.4=2x=56 4x-x=48.6 4.5x-x=28 X-5.7=2.15 15 5X-2X=18 3X+0.7=5 3.
6、5 2=4.2+x 261.5=2x+10 0.5 16160.2=4x13 9.25 X=0.403 16.9 X=0.3 X0.5=2.6 x1333 3 5x80 1.8+6x54 6.7x 60.36.7 9 4x 40 2x+8=16 x/5=10 x+7x=8 9x-3x=6 6x-8=4 5x+x=9 x-8=6x 4/5x=20 2x-6=12 7x+7=14 6x-6=0 5x+6=11 2x-8=10 1/2x-8=4 x-5/6=7 3x+7=28 3x-7=26 9x-x=16 24x+x=50 6/7x-8=4 3x-8=30 6x+6=12.精选范本3x-3=1 5
7、x-3x=4 2x+16=19 5x+8=19 14-6x=8 15+6x=27 5-8x=4 7x+8=15 9-2x=1 4+5x=9 10-x=8 8x+9=17 9+6x=14 x+9x=4+7 2x+9=17 8-4x=6 6x-7=12 7x-9=8 x-56=1 8-7x=1 x-30=12 6x-21=21 6x-3=6 9x=18 4x-18=13 5x+9=11 6-2x=11 x+4+8=23 7x-12=8 X-5.7=2.15 15 5X-2X=18 3X 0.7=5 3.5 2=4.2 x 261.5=2x 0.5 16160.2=4x 9.25X=0.403 16.9 X=0.3 X0.5=2.6 35x80 1.8-6x 54 6.7x60.36.7 9 4x40 0.2x0.40.53.7 9.4x0.4x16.2.精选范本124x20 1/3x5/6x1.4 12x34x=1 18x14x=12 23 x514=14 1234x=56 2214x=12 23x-14x=14 x14x=65 23x=14x14 30 x12x14x=1 x-0.7x=3.6X.精选范本27X=43