问题 解答题
求未知数x的值:
x÷
9
8
=
8
9

5
12
x-2=3

x×(1-
3
8
)=2÷
1
10
答案

(1)x÷

9
8
=
8
9

x÷

9
8
×
9
8
=
8
9
×
9
8

x=1;

(2)

5
12
x-2=3,

5
12
x-2+2=3+2,

5
12
x=5,

5
12
x÷
5
12
=5÷
5
12

x=12;

(3)x×(1-

3
8
)=2÷
1
10

5
8
x=20,

5
8
x÷
5
8
=20÷
5
8

x=32.

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