(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42

分类: 作业答案 • 2021-12-31 12:40:57

问题描述：

答

(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42
1.008x+1.011*42-1.011x=1.01*42
-0.003x=-0.001*42
x=14