问题 解答题
解方程:
2.5
X
=7.5:12
50%×5-
3
4
X=0.6.
答案

(1)

2.5
x
=7.5:12,

7.5x=2.5×12,

7.5x=30,

7.5x÷7.5=30÷7.5,

x=4;

(2)50%×5-

3
4
x=0.6,

2.5-

3
4
x=0.6,

0.6+

3
4
x=2.5,

0.6+

3
4
x-0.6=2.5-0.6,

3
4
x=
19
10

3
4
3
4
=
19
10
÷
3
4

x=2

8
15

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