问题描述: 12%x+10%(18-x)=20-18 1个回答 分类:数学 2014-11-07 问题解答: 我来补答 12%x+10%(18-x)=20-18等式两边等效于,0.12x+0.1×(18-x)=2化简,0.12x+1.8-0.1x=2移项,0.12x-0.1x=2-1.8化简,0.02x=0.2解得,x=0.2÷0.02=10 展开全文阅读