Question

One number is 2 more than 5 times another. Their product is 72. Find the numbers.

Answer 1

let the number be a and b
a=2+5b
a*b=72

solve these equations

Answer 2

x+2=5y
x*y=72

x=5y-2
plug into the other
(5y-2)*y=72
5y^2-2y-72=0
(5y+18)(y-4)=0
5y=-18
y=-18/5
and
y-4=0
y=4

(x+2)=5(-18/5) and (x+2)=5(4)
x=-20 and x=18