问题 解答题
解比例或解方程.
9:
1
2
=x:14
9:4.5=(x+6):8
1
8
:x=
1
10
1
3

6
13
=3.25×3.5.
答案

(1)9:

1
2
=x:14,

1
2
x=9×14,

1
2
x×2=126×2,

x=252;

(2)9:4.5=(x+6):8

4.5×(x+6)=9×8,

4.5×(x+6)÷4.5=72÷4.5,

x+6-6=16-6,

x=10;

(3)

1
8
:x=
1
10
1
3

1
10
x=
1
8
×
1
3

1
10
x×10=
1
24
×10,

x=

5
12

(4)x÷

6
13
=3.25×3.5,

6
13
=11.375,

6
13
×
6
13
=11.375×
6
13

x=5.25.

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