问题 解答题
解方程.
x÷25%=0.4x:
1
6
=0.12
55%x+x=3.1x-40%x=36.
答案

(1)x÷25%=0.4,

x÷0.25×0.25=0.4×0.25,

x=0.1;

(2)x:

1
6
=0.12,

x=0.12×

1
6

x=0.02;

(3)55%x+x=3.1,

1.55x=3.1,

1.55x÷1.55=3.1÷1.55,

x=2;

(4 )x-40%x=36,

x-0.4x=36,

0.6x=36,

0.6x÷0.6=36÷0.6,

x=60.

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