题目内容
求未知数X.
:
=X:
4X+3×0.9=24.7
=20:3.
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 5 |
4X+3×0.9=24.7
| X |
| 6 |
(1)
:
=x:
,
x=
×
,
x=
÷
,
x=
;
(2)4x+3×0.9=24.7,
4x+2.7=24.7,
4x=22,
x=5.5;
(3)
=20:3,
3x=6×20,
x=40.
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
| 2 |
| 3 |
| 3 |
| 5 |
x=
| 2 |
| 5 |
| 1 |
| 4 |
x=
| 8 |
| 5 |
(2)4x+3×0.9=24.7,
4x+2.7=24.7,
4x=22,
x=5.5;
(3)
| x |
| 6 |
3x=6×20,
x=40.
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