(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42

分类: 作业答案 • 2021-12-20 01:31:37

问题描述：

答

x＋0.8%x＋1.011×42－1.011x＝1.01×42
1.011x－1.008x＝0.042
x＝14

答

(1+0.8%)x+(1+1.1%)×42-（1+1.1%）x=(1+1%)×42
(1+0.8%)x-(1+1.1%)x=(1+1%)×42-(1+1.1%)×42
(-0.3%)x=(-0.1%)×42
x=14

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