题目内容
解方程
+x=
x-
=
x-0.25=
x-
+
=
.
| 4 |
| 5 |
| 14 |
| 15 |
| 1 |
| 6 |
| 1 |
| 2 |
| 2 |
| 5 |
| 2 |
| 3 |
| 2 |
| 7 |
| 2 |
| 7 |
(1)
+x=
,
+x-
=
-
,
x=
;
(2)x-
=
,
x-
+
=
+
,
x=
;
(3)x-0.25=
,
x-0.25+0.25=0.4+0.25,
x=0.65;
(4)x-
+
=
,
x-
+
-
=
-
,
x-
=0,
x=
.
| 4 |
| 5 |
| 14 |
| 15 |
| 4 |
| 5 |
| 4 |
| 5 |
| 14 |
| 15 |
| 4 |
| 5 |
x=
| 2 |
| 15 |
(2)x-
| 1 |
| 6 |
| 1 |
| 2 |
x-
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 6 |
x=
| 2 |
| 3 |
(3)x-0.25=
| 2 |
| 5 |
x-0.25+0.25=0.4+0.25,
x=0.65;
(4)x-
| 2 |
| 3 |
| 2 |
| 7 |
| 2 |
| 7 |
x-
| 2 |
| 3 |
| 2 |
| 7 |
| 2 |
| 7 |
| 2 |
| 7 |
| 2 |
| 7 |
x-
| 2 |
| 3 |
x=
| 2 |
| 3 |
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