The sum of two numbers is 36. Twice the first number minus the second is 6. Find the numbers
{ x + y = 36
{ 2x - y = 6 ( Cancel + y - y = 0 )
x + 2x = 36 + 6
3x = 42
x = 42
3
x = 14
Substitute x for 14 in one of the equations:
x + y = 36
14 + y = 36
y = 36 - 14
y = 22
Solution: { 14 , 22 }