问题 解答题
解方程
0.25×3+25%x=4.75
2
3
x=
5
12
4x-1.6x=48.
答案

(1)0.25×3+25%x=4.75,

0.75+25%x=4.75,

0.75+25%x-0.75=4.75-0.75,

25%x=4,

25%x÷25%=4÷25%,

x=16;

(2)

2
3
x=
5
12

2
3
2
3
=
5
12
÷
2
3

x=

5
8

(3)4x-1.6x=48,

2.4x=48,

2.4x÷2.4=48÷2.4,

x=20.

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