题目内容
求未知数x.
0.4:0.25=
,
×
+75%x=
.
0.4:0.25=
| 12 |
| x |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
(1)因为0.4:0.25=
,
则0.4:0.25=12:x,
0.4x=12×0.25,
0.4x=3,
x=7.5;
(2)
×
+75%x=
,
+
x=
,
2+9x=3,
9x=1,
x=
;
| 12 |
| x |
则0.4:0.25=12:x,
0.4x=12×0.25,
0.4x=3,
x=7.5;
(2)
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 4 |
2+9x=3,
9x=1,
x=
| 1 |
| 9 |
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