The Quotient Of Two Numbers Is 12 And Their Sum Is 91. What Are The Two Numbers?

let a and b be two numbers.
quotient is 12 sum is 91
a/b = 12 a+b=91
a=12b
put a=12b in a+b=91
12b+b=91
13b=91
b=7
now a=12b=12(7)=84

one number is 84 and the other one is 7