One number added to three times another number is 24. Five times the first number added to three times the other number is 36. Find the numbers

Answer 1

x+3y =24

5x + 3y=36

subtract 1st equation from 2nd to eliminate y

4x = 12

x = 12/4 = 3

3y = 24-x = 24-3 = 21

y = 21/3 = 7

x = 3, y = 7