题目内容
求未知数Ⅹ.
(1)2.5x+3.5x=4.8
(2)
:x=2.5:20.
(1)2.5x+3.5x=4.8
(2)
| 1 |
| 2 |
(1)2.5x+3.5x=4.8,
(2.5+3.5)x=4.8,
6x=4.8,
6x÷6=4.8÷6,
x=0.8;
(2)
:x=2.5:20,
2.5x=20×
,
2.5x=10,
2.5x÷2.5=10÷2.5,
x=4.
(2.5+3.5)x=4.8,
6x=4.8,
6x÷6=4.8÷6,
x=0.8;
(2)
| 1 |
| 2 |
2.5x=20×
| 1 |
| 2 |
2.5x=10,
2.5x÷2.5=10÷2.5,
x=4.
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