12.5-2.5x=3.5x
x+12.5=3.5x
3X+2.5=5X-12.5
3.5X+2.5(14-X)=4
(X+X)+(X-X)+(X*X)+(X/X)=100
2x+2.5x=27 2x+3.5x=27.5 解方程
1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6
解方程:2-3.5x=-4.5x 2x=3x+16 2.5x-1.9=1.8x+1.6
解方程.12.5%X-2.5%X=9
解方程:3.5x+2.5x=9
方程3.5x+(40-x)2.5=125怎么解?
x+x=x+15
求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x