
1个回答
展开全部
(1)
=7.5:12,
7.5x=2.5×12,
7.5x=30,
7.5x÷7.5=30÷7.5,
x=4;
(2)50%×5-
x=0.6,
2.5-
x=0.6,
0.6+
x=2.5,
0.6+
x-0.6=2.5-0.6,
x=
,
x÷
=
÷
,
x=2
.
2.5 |
x |
7.5x=2.5×12,
7.5x=30,
7.5x÷7.5=30÷7.5,
x=4;
(2)50%×5-
3 |
4 |
2.5-
3 |
4 |
0.6+
3 |
4 |
0.6+
3 |
4 |
3 |
4 |
19 |
10 |
3 |
4 |
3 |
4 |
19 |
10 |
3 |
4 |
x=2
8 |
15 |
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