题目内容
解方程
x-
|
x-0.8x=22 | 2x+0.9×3=24.7. |
(1)x-
=
,
x-
+
=
+
,
x=
,
(2)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110,
(3)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
x=11.
| 2 |
| 5 |
| 3 |
| 10 |
x-
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 10 |
| 2 |
| 5 |
x=
| 7 |
| 10 |
(2)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110,
(3)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
x=11.
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