求未知数x x-20%x=52 (1-60%)X=24
问题描述:
求未知数x x-20%x=52 (1-60%)X=24
答
x-20%x=52
80%x=52
4/5x=52
4x=260
x=65
(1-60%)X=24
(1-0.6)x=24
0.4x=24
x=60