问题
解答题
解方程:
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答案
(1)4x+12=40,
4x+12-12=40-12,
4x=28,
4x÷4=28÷4,
x=7.
(2)0.4x+25%x=26,
0.4x+0.25x=26,
0.65x=26,
0.65x÷0.65=26÷0.65,
x=40.
(3)37.5%-
x=3 5
,3 8
0.375-0.6x=0.375,
0.6x=0,
x=0.
解方程:
|
(1)4x+12=40,
4x+12-12=40-12,
4x=28,
4x÷4=28÷4,
x=7.
(2)0.4x+25%x=26,
0.4x+0.25x=26,
0.65x=26,
0.65x÷0.65=26÷0.65,
x=40.
(3)37.5%-
x=3 5
,3 8
0.375-0.6x=0.375,
0.6x=0,
x=0.