Question

Find the x-coordinate of the solution for this system of equations.

4x + 2y = -4

x = 2y + 9

Answer 1

4x + 2y = -4


4(2y+9) + 2y = -4


8y+36 + 2y = -4


10y+36 = -4


10y = -4-36


10y = -40


y = -40/10


y = -4

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x = 2y+9


x = 2(-4)+9


x = -8+9


x = 1


So the answer is x = 1