问题 解答题
解方程.
1+25%X=3.75X:14=6:28
1
4
1
6
=X:
2
3
X-15%X=8.5.
答案

(1)1+25%X=3.75,

1+25%X-1=3.75-1,

25%X=2.75,

25%X÷25%=2.75÷25%,

X=11;

(2)X:14=6:28,

28X=14×6,

28X=84,

28X÷28=84÷28,

X=3;

(3)

1
4
1
6
=X:
2
3

1
6
X=
1
4
×
2
3

1
6
X=
1
6

1
6
1
6
=
1
6
÷
1
6

X=1;

(4)X-15%X=8.5,

0.85X=8.5,

0.85X÷0.85=8.5÷0.85,

X=10.

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