问题 解答题
解方程:
x×(1+
1
4
)=60
3
4
÷x=
3
8
15
16
x-
3
4
=
1
4
x
3
1
2
=
4
9
答案

(1)x×(1+

1
4
)=60,

5
4
x=60,

5
4
4
5
=60×
4
5

x=48;

(2)

3
4
÷x=
3
8

3
4
÷x×x=
3
8
x

3
4
×
8
3
=
3
8
8
3

x=2;

(3)

15
16
x-
3
4
=
1
4

15
16
x-
3
4
+
3
4
=
1
4
+
3
4

15
16
16
15
=1×
16
15

x=

16
15

(4)

x
3
1
2
=
4
9

x
3
=
1
2
×
4
9

x
3
×3=
2
9
×3

x=

2
3

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