Question

A certain fraction has a value of 15. the denominator is four more than three times the numerator. what is the fraction?

Answer 1

n/d = 15
d= 4 + 3n

d=n/15
n/15=4+3n
n=60+45n
44n=-60
n=-15/11
-15/11 / d = 15
-15/11 = 15d
d=-1/11

15/11 / 1/11. = 15