1/4+(52-x)*2/5=16 x=?

问题描述:

1/4+(52-x)*2/5=16 x=?

1/4 + (52 - x)*2/5 = 1
两边同时乘以 20 得 :
5 + 8(52 - x) = 20
5 + 416 - 8x = 20
8x = 5 + 416 - 20
8x = 401
x = 401/8