Consider the system of equations. 2 - 4y = 8
3x +y=12
Which shows an equivalent system of equations?
2 - 4y = 8
90 + 4y = -36
- 4y = 8
90 + 4y = 36
o
2- 4y=8
12x + 4y = -48
2 - 4y=8
12r + 4y = 48

57

Explanation:
The 57 and x are exterior alternate angles.
What does this mean?

Well the definition of exterior alternate angles is that if you have two parallel lines and you draw a line crossing them, the angles on the outside of the two lines equal each other!