X-(2/3X+80+140)-3/4X=90怎么解
问题描述:
X-(2/3X+80+140)-3/4X=90怎么解
答
X-(2/3X+80+140)-3/4X=90
x-2/3x-80-140-3/4x=90
x-2/3x-3/4x=90+140+80
-5/12x=310
x=744