Answer:
Step-by-step explanation:
5x-4+7x-8=180
12x-12=180
12x=192
x = 16
5(16)-4= 80-4= 76 degrees
7(16)-8= 112-8= 104 degrees
9y + 5 = 104
9y = 99
y = 11
9(11) + 5 = 99 + 5 = 104
