、解方程 (0.5+X)+X=9.8 + 25000+X=6X 3200=450+5X+X 12X-8X=4.8 7.5 X 2X=15 X+5.6=9.4 15X 2 2(X+X+0.5)=9.8 X-0.8X=6 1.2X=81.6 = 3 3X - 8 = 16 7(X-2)=2X+3 3X+9=27 12X=300-4X 7X+5.3=7.4 30 - X+25=85 3(X+0.5)=21 0.5X+8=43 3X + 5=4.8 18(X-2)=270 6X-3X=18 1.5X+18=3X 5 X 3-X + 2=8 0.273 - X=0.35 X-7.7=2.58 7(2x-6)=84 5x-3x=68 5(x-8)=3x 4(4x -1)=3( 22-x) 7x-7=6x+4 (22-x)=68x 240 - (x-7)=30 12+8x=3 1.4 X 8-2x=6 3 (x+0.5) =21 1.5x+18=3x x+ 5+9=21 8x-6x+30=12x+15 (20-8x) + 3=2x+1 (21+4x)x2=10x+14 6x- 12.8X 3=0.06 0.5x+8=43 5 X 3-x+ 2=8 48-27+5x=31 7(x+20)=5x+60 (6x-40)* 8=5x-8 15 - 3x=5 410 -3x=170 6x-3x=18 1.8x=0.972 本文来源：https://www.wddqw.com/doc/8b778ef5d25abe23482fb4daa58da0116d171f75.html