题目内容
| 解方程 x+
|
| ||||||||||
| x-(
|
①x+
=
x+
-
=
-
x=
;
②
-x=
-x+x=
+x
-
=
-
+x
x=
;
③
-x=
-x+x=
+x
=
+x
x=
;
④x-(
+
)=
x-
=
x-
+
=
+
x=
.
| 2 |
| 7 |
| 9 |
| 14 |
x+
| 2 |
| 7 |
| 2 |
| 7 |
| 9 |
| 14 |
| 2 |
| 7 |
x=
| 5 |
| 14 |
②
| 7 |
| 20 |
| 1 |
| 5 |
| 7 |
| 20 |
| 1 |
| 5 |
| 7 |
| 20 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x=
| 3 |
| 20 |
③
| 11 |
| 15 |
| 1 |
| 3 |
| 11 |
| 15 |
| 1 |
| 3 |
| 11 |
| 15 |
| 1 |
| 3 |
x=
| 2 |
| 5 |
④x-(
| 2 |
| 7 |
| 3 |
| 8 |
| 5 |
| 28 |
x-
| 37 |
| 56 |
| 10 |
| 56 |
x-
| 37 |
| 56 |
| 37 |
| 56 |
| 10 |
| 56 |
| 37 |
| 56 |
x=
| 47 |
| 56 |
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