Question

the numerator of a rational number is 3 less than denominator if the denominator is increased by 5 and the numerator by 2 we get rational number 1/2 .Find the rational number

Answer 1

x/x+3

x+2/x+3+5=1/2
2(x+2)=x+8
4x+4=x+8
3x=12
x=4
rational number=x/x+3
=4/7