问题 解答题
80%X+12=40X-20%X=16
X+30%X=651-
1
3
X=
5
6
(1-60%)X=0.32125%X-X=44.
答案

(1)80%x+12=40,

80%x+12-12=40-12,

80%x÷80%=28÷80%,

x=35;

(2)x-20%x=16,

80%x=16,

80%x÷80%x=16÷80%,

x=20;

(3)x+30%x=65,

130%x=65,

130%x÷130%=65÷130%,

x=50;

(4)1-

1
3
x=
5
6

1-

1
3
x+
1
3
x=
5
6
+
1
3
x,

1-

5
6
=
5
6
+
1
3
x-
5
6

1
6
÷
1
3
=
1
3
1
3

x=

1
2

(5)(1-60%)x=0.32,

40%x=0.32,

40%x÷40%=0.32÷40%,

x=0.08;

(6)125%x-x=44,

0.25x=44,

0.25x÷0.25=44÷0.25,

x=176.

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