问题
解答题
求未知数Ⅹ. (1)2.5x+3.5x=4.8 (2)
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答案
(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=2.5:20,1 2
2.5x=20×
,1 2
2.5x=10,
2.5x÷2.5=10÷2.5,
x=4.
求未知数Ⅹ. (1)2.5x+3.5x=4.8 (2)
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(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=2.5:20,1 2
2.5x=20×
,1 2
2.5x=10,
2.5x÷2.5=10÷2.5,
x=4.