题目内容
我会解方程.
2x-
|
| x:
|
(1)2x-
=
,
2x-
+
=
+
,
2x=
,
2x÷2=
÷2,
x=
;
(2)
x+
x=42,
x=42,
x÷
=42÷
,
x=36;
(3)x:
=
,
x÷
=
,
x÷
×
=
×
,
x=
.
| 1 |
| 4 |
| 5 |
| 6 |
2x-
| 1 |
| 4 |
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 4 |
2x=
| 13 |
| 12 |
2x÷2=
| 13 |
| 12 |
x=
| 13 |
| 24 |
(2)
| 2 |
| 3 |
| 1 |
| 2 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
x=36;
(3)x:
| 4 |
| 5 |
| 4 |
| 15 |
x÷
| 4 |
| 5 |
| 4 |
| 15 |
x÷
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 15 |
| 4 |
| 5 |
x=
| 16 |
| 75 |
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