Answer:
x = 14
Explanation:
(4y - 10) + 3x = 180
in other hand: 4y - 10 = 9x + 12
so : (9x + 12) + 3x = 180
9x + 3x = 180 - 12
12x = 168
x = 168/12
5.3m questions
6.9m answers