题目内容
解下列方程
9x+4x=120+10
x-(5+4
)=1
.
9x+4x=120+10
x-(5+4
| 1 |
| 3 |
| 1 |
| 5 |
(1)9x+4x=120+10,
(9+4)x=130,
13x=130,
13x÷13=130÷13,
x=10;
(2)x-(5+4
)=1
,
x-9
=1
,
x-9
+9
=1
+9
,
x=10
.
(9+4)x=130,
13x=130,
13x÷13=130÷13,
x=10;
(2)x-(5+4
| 1 |
| 3 |
| 1 |
| 5 |
x-9
| 1 |
| 3 |
| 1 |
| 5 |
x-9
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
x=10
| 8 |
| 15 |
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