问题
解答题
求未知数x的值.
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答案
(1)5x+0.75×4=6.5,
5x+3=6.5,
5x+3-3=6.5-3,
5x=3.5,
5x÷5=3.5÷5,
x=0.7;
(2)x:
=21:5 14
,5 8
x=5 8
×215 14
x=5 8
,15 2
x×8=5 8
×8,15 2
5x=60,
5x÷5=60÷5,
x=12.
求未知数x的值.
|
(1)5x+0.75×4=6.5,
5x+3=6.5,
5x+3-3=6.5-3,
5x=3.5,
5x÷5=3.5÷5,
x=0.7;
(2)x:
=21:5 14
,5 8
x=5 8
×215 14
x=5 8
,15 2
x×8=5 8
×8,15 2
5x=60,
5x÷5=60÷5,
x=12.