题目内容
解方程.
x+
x=
-4x=
.
x+
| 1 |
| 4 |
| 5 |
| 12 |
| 7 |
| 8 |
| 7 |
| 12 |
(1)x+
x=
,
(1+
)x=
,
x=
,
x×
=
×
,
x=
;
(2)
-4x=
,
(
-4x)×24=
×24,
21-96x=14,
21-96x+96x=14+96x,
14+96x=21,
14+96x-14=21-14,
96x=7,
x=
.
| 1 |
| 4 |
| 5 |
| 12 |
(1+
| 1 |
| 4 |
| 5 |
| 12 |
| 5 |
| 4 |
| 5 |
| 12 |
| 5 |
| 4 |
| 4 |
| 5 |
| 5 |
| 12 |
| 4 |
| 5 |
x=
| 1 |
| 3 |
(2)
| 7 |
| 8 |
| 7 |
| 12 |
(
| 7 |
| 8 |
| 7 |
| 12 |
21-96x=14,
21-96x+96x=14+96x,
14+96x=21,
14+96x-14=21-14,
96x=7,
x=
| 7 |
| 96 |
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