问题描述: 方程20*10%+30%X分之X+20=22%怎么解 1个回答 分类:数学 2014-12-03 问题解答: 我来补答 20*10%+30%X分之X+20=22%20(0.1)+(x+20)/(0.3x) = 0.222 + 10(x+20)/(3x) = 0.226x + 10(x+20) = 0.66x15.34x= -2001534 x = -20000x = -10000/767 展开全文阅读