Question

help me I can't understand this​

Answer 1

(x+2)/(x+7)=1/2

2x+4=x+7

x=3

Answer 2

Let m be the numerator. Then denominator is m+5
So (m+2)/(m+5+2)=1/2
(m+2)/(m+7)=1/2
2(m+2)=m+7
m=3
So the number is 3/8