(x-10)/x*100%=50%求解
问题描述:
(x-10)/x*100%=50%求解
答
x-10=1/2*x
1/2*x=10
x=10*2
x=20
(x-10)/x*100%=50%求解
x-10=1/2*x
1/2*x=10
x=10*2
x=20