1、6.7x+5x9.36 12x120720 X0.7x0.513(x-2)+482=96 x-0.8x-6=16 2X18=286X24=120 725X=57 16.54X=24.52.4（2.5X）=24 7x-7=6x+4 3x+7=4x-23x-8=x 6（2x+x）=36 （x+4.8）6=36x8.3=11 4x8=12.5 8x4.25.8=14（x-9）12=63.6 3x+5x=120 3x-1.5x=303x-24+5x=48 0.19X0.019 8X0.4 52X =15 3X654 7X+1.519 5X432 X3.218.2 4X+1.25=24.43+8X5X=
2、27 4x300 8.3x2x63x10 = 5.2 3x+ 7x +10 = 90 3（x-12+23 = 357x82x27 5x-18 =32x （7x- 4）+3（x-2）=2x +62(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+XX-0.8X=6 12x-8x=4.8 x+5.6=9.452x15 91x 1.3 X+8.3=10.715x3 3x816 7(x-2)=2x+312x=300-4x 7x+5.3=7.4 3x5=4.830x+25=85 1.48-2x=6 3(x+0.5)=216x-12.83=0.06 410-3x=170 0.5x+8=436x-3x=18 1.5x+18=3x 53-x2=80.273x=0.35 1.8x=0.972 x5+9=21x0.756=90 9x-40=5 48-27+5x=3110.5+x+21=56 x+2x+18=78 (200-x)5=30(x-140)70=4 0.1(x+6)=3.30.44 (x-5.6)=1.67(6.5+x)=87.5 (27.5-3.5)x=4 x+19.8=25.875.6x=12.6 5x+12.5=32.3
