题目内容
解方程.
(1)x+
=
(2)
-x=
(3)4x-
=2-
.
(1)x+
| 3 |
| 4 |
| 11 |
| 12 |
| 13 |
| 16 |
| 3 |
| 8 |
| 1 |
| 3 |
| 1 |
| 3 |
(1)x+
=
,
x+
-
=
-
,
x=
-
,
x=
;
(2)
-x=
,
-x+x=
+x,
+x=
,
-
+x=
-
,
x=
-
,
x=
;
(3)4x-
=2-
,
4x=2,
4x÷4=2÷4,
x=0.5.
| 3 |
| 4 |
| 11 |
| 12 |
x+
| 3 |
| 4 |
| 3 |
| 4 |
| 11 |
| 12 |
| 3 |
| 4 |
x=
| 11 |
| 12 |
| 9 |
| 12 |
x=
| 1 |
| 6 |
(2)
| 13 |
| 16 |
| 3 |
| 8 |
| 13 |
| 16 |
| 3 |
| 8 |
| 3 |
| 8 |
| 13 |
| 16 |
| 3 |
| 8 |
| 3 |
| 8 |
| 13 |
| 16 |
| 3 |
| 8 |
x=
| 13 |
| 16 |
| 6 |
| 16 |
x=
| 7 |
| 16 |
(3)4x-
| 1 |
| 3 |
| 1 |
| 3 |
4x=2,
4x÷4=2÷4,
x=0.5.
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