0.8x+1.2(90-x)=88的解
问题描述:
0.8x+1.2(90-x)=88的解
答
0.8X+108-1.2X=88
0.4X=20
X=50
答
0.8x+1.2(90-x)=88
0.8X+108-1.2X=88
-0.4X=88-108
0.4X=20
X=50