题目内容
| 解方程: 50%χ+30%χ=8 |
|
(1)50%x+30%x=8,
80%x=8,
80%x÷80%=8÷80%,
x=10,
(2)
÷x=
,
:x=2:28,
2x=
×28,
2x÷2=120÷2,
x=60.
80%x=8,
80%x÷80%=8÷80%,
x=10,
(2)
| 30 |
| 7 |
| 2 |
| 28 |
| 30 |
| 7 |
2x=
| 30 |
| 7 |
2x÷2=120÷2,
x=60.
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题目内容
| 解方程: 50%χ+30%χ=8 |
|
| 30 |
| 7 |
| 2 |
| 28 |
| 30 |
| 7 |
| 30 |
| 7 |