Answer:
1) 4x + 5y = 20 4x + 5y = 20
-2x + 3y = 12 --> 2(-2x + 3y) = 2(12)
2) 4x + 5y = 20
-4x + 6y = 24
3) 4x + 5y = 20
-4x + 6y = 24
0x + 11y = 44
4) 11y = 44
5) y = 4
6) 4x + 5y = 20
4x + 5(4) = 20
7) 4x + 20 = 20
8) 4x = 0
9) x = 0
10) The solution is the point (0, 4)
