题目内容
| 解方程. (1)
| (2)x+30%x=52 | (3)
|
(1)
x-
=
,
x-
+
=
+
,
x=1,
x÷
=1÷
,
x=1
;
(2)x+30%x=52,
1.3x=52,
1.3x÷1.3=52÷1.3,
x=40;
(3)
=
:x,
10x=42×
,
10x=30,
10x÷10=30÷10,
x=3.
| 2 |
| 3 |
| 4 |
| 9 |
| 5 |
| 9 |
| 2 |
| 3 |
| 4 |
| 9 |
| 4 |
| 9 |
| 5 |
| 9 |
| 4 |
| 9 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=1
| 1 |
| 2 |
(2)x+30%x=52,
1.3x=52,
1.3x÷1.3=52÷1.3,
x=40;
(3)
| 10 |
| 42 |
| 5 |
| 7 |
10x=42×
| 5 |
| 7 |
10x=30,
10x÷10=30÷10,
x=3.
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