(80.51-x)/x=0.2 解x等于多少
问题描述:
(80.51-x)/x=0.2 解x等于多少
答
(80.51-x)/x=0.2
(80.51-x)=0.2x
0.2x+x=80.51
1.2x=80.51
x=80.51÷1.2
x=8051/120 (120分之8051)