题目内容
解方程:
(1)(x-2):
=x:2;
(2)(x+0.3):0.7=13:7.
(1)(x-2):
| 2 |
| 3 |
(2)(x+0.3):0.7=13:7.
(1)(x-2):
=x:2
x=2×(x-2),
x+4=2x-4+4,
x+4-
x=2x-
x,
4÷1
=1
x÷1
,
x=3;
(2)(x+0.3):0.7=13:7,
7×(x+0.3)=0.7×13,
7x+2.1-2.1=9.1-2.1,
7x÷7=7÷7,
x=1.
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
4÷1
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=3;
(2)(x+0.3):0.7=13:7,
7×(x+0.3)=0.7×13,
7x+2.1-2.1=9.1-2.1,
7x÷7=7÷7,
x=1.
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