0.8x+1.2(90-x)=88的解

问题描述:

0.8x+1.2(90-x)=88的解

0.8X+108-1.2X=88
0.4X=20
X=50

0.8x+1.2(90-x)=88
0.8X+108-1.2X=88
-0.4X=88-108
0.4X=20
X=50