Question

If the product of two positive integers is 507, and the least common multiple of them is 39, what is the sum of the two positive integers?

Answer 1

xy=507
ax=by=39
from 1º equation: x=507/y
into 2º: 507a/y=by=39
rearange and solve for y

Answer 2

try writing 507 and 39 as a product of prime numbers - that will help you get to the answer