题目内容
解方程 x-
|
| 12x-9x=8.7 | ||||||||
| 2x+1=5 | 3x-x=0.9 | x-
|
(1)x-
=
,
x-
+
=
+
,
x=
;
(2)
+x=
,
+x-
=
-
,
x=
;
(3)12x-9x=8.7,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(4)2x+1=5,
2x+1-1=5-1,
2x÷2=4÷2,
x=2;
(5)3x-x=0.9,
2x=0.9,
2x÷2=0.9÷2,
x=0.45;
(6)x-
=
,
x-
+
=
+
,
x=
.
| 5 |
| 6 |
| 1 |
| 9 |
x-
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 9 |
| 5 |
| 6 |
x=
| 17 |
| 18 |
(2)
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
x=
| 1 |
| 3 |
(3)12x-9x=8.7,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(4)2x+1=5,
2x+1-1=5-1,
2x÷2=4÷2,
x=2;
(5)3x-x=0.9,
2x=0.9,
2x÷2=0.9÷2,
x=0.45;
(6)x-
| 3 |
| 4 |
| 1 |
| 12 |
x-
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 12 |
| 3 |
| 4 |
x=
| 5 |
| 6 |
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