问题 解答题
解方程.
x-80%x=4875%x-5×
3
5
=6.
答案

(1)x-80%x=48,

(1-0.8)x=48,

0.2x=48,

0.2x÷0.2=48÷0.2,

x=240;

(2)75%x-5×

3
5
=6,

0.75x-3=6,

0.75x-3+3=6+3,

0.75x=9,

0.75x÷0.75=9÷0.75,

x=12.

单项选择题
单项选择题