Corresponding angles are equal
2x + 7 = 3x - 7
3x - 2x = 7 + 7
x = 14
The sum of adjacent angles is 180
2x + 7 + 12 y + 1 = 180
2x + 12y + 8 = 180
2x + 12y = 180 - 8
2x + 12y = 172
12y = 172 -2x
Substitute x = 14 into 12y = 172 -2x
12y = 172 - 2(14)
12y = 172 - 28
12y = 144
y = 12
ans: x = 14, y = 12
