问题 解答题
求未知数x:
2
3
x-
1
5
x=4.9
1
6
:0.8=x:48.
答案

(1)

2
3
x-
1
5
x=4.9,

7
15
x=4.9,

7
15
15
7
=4.9×
15
7

x=10.5;

(2)

1
6
:0.8=x:48,

0.8x=

1
6
×48,

0.8x÷0.8=8÷0.8,

x=10.

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