题目内容
| 求未知数x. (1)436÷x=10×25% | (2)x-108÷1.5=70÷150% | ||||||
(3)0.4:
| (4)
|
(1)436÷x=10×25%,
436÷x=2.5,
436÷x×x=2.5×x,
2.5x=436,
2.5x÷2.5=436÷2.5,
x=174.4;
(2)x-108÷1.5=70÷150%,
x-72=70÷
,
x-72+72=
+72,
x=
;
(3)0.4:
=x:60,
x=0.4×60,
x=24,
x×
=24×
,
x=30;
(4)
:
=24:2x,
×2x=
×24,
x=4,
x×
=4×
,
x=
.
436÷x=2.5,
436÷x×x=2.5×x,
2.5x=436,
2.5x÷2.5=436÷2.5,
x=174.4;
(2)x-108÷1.5=70÷150%,
x-72=70÷
| 3 |
| 2 |
x-72+72=
| 140 |
| 3 |
x=
| 356 |
| 3 |
(3)0.4:
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 5 |
| 4 |
| 5 |
| 4 |
x=30;
(4)
| 4 |
| 5 |
| 1 |
| 6 |
| 4 |
| 5 |
| 1 |
| 6 |
| 8 |
| 5 |
| 8 |
| 5 |
| 5 |
| 8 |
| 5 |
| 8 |
x=
| 5 |
| 2 |
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