题目内容
解方程:
χ-
=
χ-
-
=1
2χ-
=
(检验)
χ-
| 5 |
| 12 |
| 3 |
| 8 |
χ-
| 2 |
| 3 |
| 1 |
| 4 |
2χ-
| 1 |
| 12 |
| 11 |
| 12 |
(1)x-
=
,
x-
+
=
+
,
x=
;
(2)x-
-
=1,
x-
=1,
x-
+
=1+
,
x=1
;
(3)2x-
=
,
2x-
+
=
+
,
2x÷2=1÷2,
x=0.5,
把x=0.5代入原方程左边可得:
2×0.5-
,
=1-
,
=
,
左边=右边,
故x=0.5是原方程的解.
| 5 |
| 12 |
| 3 |
| 8 |
x-
| 5 |
| 12 |
| 5 |
| 12 |
| 3 |
| 8 |
| 5 |
| 12 |
x=
| 19 |
| 24 |
(2)x-
| 2 |
| 3 |
| 1 |
| 4 |
x-
| 11 |
| 12 |
x-
| 11 |
| 12 |
| 11 |
| 12 |
| 11 |
| 12 |
x=1
| 11 |
| 12 |
(3)2x-
| 1 |
| 12 |
| 11 |
| 12 |
2x-
| 1 |
| 12 |
| 1 |
| 12 |
| 11 |
| 12 |
| 1 |
| 12 |
2x÷2=1÷2,
x=0.5,
把x=0.5代入原方程左边可得:
2×0.5-
| 1 |
| 12 |
=1-
| 1 |
| 12 |
=
| 11 |
| 12 |
左边=右边,
故x=0.5是原方程的解.
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