80%x-40%x=3
问题描述:
80%x-40%x=3
答
80%x-40%x=3
(80%-40%)x=3
40%x=3
x=3÷40%
x=7.5
80%x-40%x=3
80%x-40%x=3
(80%-40%)x=3
40%x=3
x=3÷40%
x=7.5