题目内容
解方程.
2.8x-4.6=17.8
2x+
x=
.
2.8x-4.6=17.8
2x+
| 4 |
| 3 |
| 5 |
| 6 |
(1)2.8x-4.6=17.8,
2.8x-4.6+4.6=17.8+4.6,
2.8x÷2.8=22.4÷2.8,
x=8;
(2)2x+
x=
,
x=
,
x÷
=
÷
,
x=
.
2.8x-4.6+4.6=17.8+4.6,
2.8x÷2.8=22.4÷2.8,
x=8;
(2)2x+
| 4 |
| 3 |
| 5 |
| 6 |
| 10 |
| 3 |
| 5 |
| 6 |
| 10 |
| 3 |
| 10 |
| 3 |
| 5 |
| 6 |
| 10 |
| 3 |
x=
| 1 |
| 4 |
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