题目内容
解方程
2x+2.7=24.7
x-
x=
=
.
2x+2.7=24.7
x-
| 2 |
| 3 |
| 1 |
| 3 |
| 0.75 |
| x |
| 25 |
| 8 |
(1)2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(1)x-
x=
(1-
)x=
,
x=
,
x÷
=
÷
,
x=1;
(3)
=
,
25x=0.75×8,
25x=6,
25x÷25=6÷25,
x=0.24.
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(1)x-
| 2 |
| 3 |
| 1 |
| 3 |
(1-
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=1;
(3)
| 0.75 |
| x |
| 25 |
| 8 |
25x=0.75×8,
25x=6,
25x÷25=6÷25,
x=0.24.
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