题目内容
解方程.
x+
=
+x=
1-x=
7x+7=14
10x-x=0.9
x-
=
.
x+
| 1 |
| 8 |
| 1 |
| 2 |
| 5 |
| 9 |
| 17 |
| 18 |
1-x=
| 4 |
| 7 |
7x+7=14
10x-x=0.9
x-
| 1 |
| 3 |
| 1 |
| 4 |
①x+
=
,
x+
-
=
-
,
x=
;
②
+x=
,
+x-
=
-
,
x=
;
③1-x=
,
1-x+x=
+x,
+x=1,
x=
;
④7x+7=14
7x+7-7=14-7,
7x=7,
x=1;
⑤10x-x=0.9,
9x=0.9,
9x÷9=0.9÷9,
x=0.1;
⑥x-
=
,
x-
+
=
+
,
x=
.
| 1 |
| 8 |
| 1 |
| 2 |
x+
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 2 |
| 1 |
| 8 |
x=
| 3 |
| 8 |
②
| 5 |
| 9 |
| 17 |
| 18 |
| 5 |
| 9 |
| 5 |
| 9 |
| 17 |
| 18 |
| 5 |
| 9 |
x=
| 7 |
| 18 |
③1-x=
| 4 |
| 7 |
1-x+x=
| 4 |
| 7 |
| 4 |
| 7 |
x=
| 3 |
| 7 |
④7x+7=14
7x+7-7=14-7,
7x=7,
x=1;
⑤10x-x=0.9,
9x=0.9,
9x÷9=0.9÷9,
x=0.1;
⑥x-
| 1 |
| 3 |
| 1 |
| 4 |
x-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
x=
| 7 |
| 12 |
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