问题
解答题
解方程 (1)x-25%x=3.75 (2)
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答案
(1)x-25%x=3.75,
x=3.75,3 4
x×3 4
=3.75×4 3
,4 3
x=5;
(2)
=x 2
,0.15 6
6x=2×0.15,
6x=0.3,
6x÷6=0.3÷6,
x=
.1 20
解方程 (1)x-25%x=3.75 (2)
|
(1)x-25%x=3.75,
x=3.75,3 4
x×3 4
=3.75×4 3
,4 3
x=5;
(2)
=x 2
,0.15 6
6x=2×0.15,
6x=0.3,
6x÷6=0.3÷6,
x=
.1 20