Question

How do you solve the system `4x - 8y = 0` and `-3x + 8y = -7`?

Answer 1

4x - 8y = 0 -> x = (8y)/4 = 2y

-3x + 8y = -7 -> -6y + 8y = -7 -> 2y = -7 -> y = -7/2

x = -7.

Check: -28 + 56/2 = 0 OK