Question

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x + 4y = -36
4x + 4y = 12

Answer 1

4x = -36 - 4y
So,
(-36 - 4y) + 4y = 12
-36 = 12

This system has no solution

Answer 2

x + y = -9
(x + y = 3) *-1


x + y = -9
-x - y = -3

=-12 so it has no solution :D

Answer 3

Thank you very much!