题目内容
| 解方程. (1)x:
| (2)0.6x=
| (3)2x-0.8=
|
(1)x:
=
,
4x=
×3,
4x÷4=
÷4,
x=
;
(2)0.6x=
,
0.6x÷0.6=
÷0.6,
x=
;
(3)2x-0.8=
,
2x-0.8+0.8=
+0.8,
2x=
,
2x÷2=
÷2,
x=
.
| 3 |
| 8 |
| 3 |
| 4 |
4x=
| 3 |
| 8 |
4x÷4=
| 9 |
| 8 |
x=
| 9 |
| 32 |
(2)0.6x=
| 4 |
| 9 |
0.6x÷0.6=
| 4 |
| 9 |
x=
| 20 |
| 27 |
(3)2x-0.8=
| 1 |
| 4 |
2x-0.8+0.8=
| 1 |
| 4 |
2x=
| 21 |
| 20 |
2x÷2=
| 21 |
| 20 |
x=
| 21 |
| 40 |
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