题目内容
解方程.
6.8-0.8x=2
x:
=
:
.
6.8-0.8x=2
x:
| 1 |
| 4 |
| 2 |
| 5 |
| 3 |
| 10 |
(1)6.8-0.8x=2,
6.8-0.8x+0.8x=2+0.8x,
2+0.8x=6.8,
2+0.8x-2=6.8-2,
0.8x=4.8,
0.8x÷0.8=4.8÷0.8,
x=6;
(2)x:
=
:
,
x=
×
,
x=
,
x÷
=
÷
,
x=
×
,
x=
.
6.8-0.8x+0.8x=2+0.8x,
2+0.8x=6.8,
2+0.8x-2=6.8-2,
0.8x=4.8,
0.8x÷0.8=4.8÷0.8,
x=6;
(2)x:
| 1 |
| 4 |
| 2 |
| 5 |
| 3 |
| 10 |
| 3 |
| 10 |
| 1 |
| 4 |
| 2 |
| 5 |
| 3 |
| 10 |
| 1 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 1 |
| 10 |
| 3 |
| 10 |
x=
| 1 |
| 10 |
| 10 |
| 3 |
x=
| 1 |
| 3 |
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