题目内容
求未知数
|
| 3.2X-4×3=52. |
(1)
X+
X=
,
(
+
)X=
,
X=
,
X×
=
×
,
X=
;
(2)
=
,
5x×2.4=6×5,
12x=30,
12x÷12=30÷12,
x=2.5;
(3)3.2X-4×3=52,
3.2X-12=52,
3.2X-12+12=52+12,
3.2X=64,
3.2X÷3.2=64÷3.2,
X=20.
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 8 |
(
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 4 |
| 4 |
| 3 |
| 5 |
| 8 |
| 4 |
| 3 |
X=
| 5 |
| 6 |
(2)
| 6 |
| 5x |
| 2.4 |
| 3.8+1.2 |
5x×2.4=6×5,
12x=30,
12x÷12=30÷12,
x=2.5;
(3)3.2X-4×3=52,
3.2X-12=52,
3.2X-12+12=52+12,
3.2X=64,
3.2X÷3.2=64÷3.2,
X=20.
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