题目内容
5
| 当x为何值时
|
5
-2x=5-1
-2
,
5
-2x=1.2,
5
-2x+2x=1.2+2x,
1.2+2x=5
,
1.2+2x-1.2=5
-1.2,
2x=4,
2x÷2=4÷2,
x=2;
(2)
-
=2.5,
4(x+2)-3(x-3)=30,
x+17=30,
x+17-17=30-17,
x=13.
答;x为13时,
比
大2.5.
| 1 |
| 5 |
| 1 |
| 2 |
| 3 |
| 10 |
5
| 1 |
| 5 |
5
| 1 |
| 5 |
1.2+2x=5
| 1 |
| 5 |
1.2+2x-1.2=5
| 1 |
| 5 |
2x=4,
2x÷2=4÷2,
x=2;
(2)
| x+2 |
| 3 |
| x-3 |
| 4 |
4(x+2)-3(x-3)=30,
x+17=30,
x+17-17=30-17,
x=13.
答;x为13时,
| x+2 |
| 3 |
| x-3 |
| 4 |
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