Problema Solution
Three times a first number is decreased by six times a second number the result is fifteen.
What are the numbers?
Answer provided by our tutors
let 'x' and 'y' represent the numbers
3x - 6y = 15
x = (15 + 6y)/3
x = 5 + 2y
any numbers that satisfies the above equation is a solution to this problem, thus there are infinite number of solutions.
For y = 1 we find x = 2 + 5*1 = 7
indeed 3*7 - 6*1 = 15 thus one solution for the numbers is 7 and 1.