题目内容
解方程:
①X+
=
②2X-
=
③
-X=1-
.
①X+
| 2 |
| 9 |
| 7 |
| 9 |
| 1 |
| 6 |
| 5 |
| 6 |
| 3 |
| 5 |
| 3 |
| 4 |
①X+
=
,
x+
-
=
-
,
x=
;
②2X-
=
,
2x-
+
=
+
,
2x÷2=1÷2,
x=
;
③
-X=1-
.
-x=
,
x=
-
,
x=
.
| 2 |
| 9 |
| 7 |
| 9 |
x+
| 2 |
| 9 |
| 2 |
| 9 |
| 7 |
| 9 |
| 2 |
| 9 |
x=
| 5 |
| 9 |
②2X-
| 1 |
| 6 |
| 5 |
| 6 |
2x-
| 1 |
| 6 |
| 1 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
2x÷2=1÷2,
x=
| 1 |
| 2 |
③
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
x=
| 3 |
| 5 |
| 1 |
| 4 |
x=
| 7 |
| 20 |
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