y=3 because when you multiply 6 to both numbers, 4.5y and 12, you will get 27y and 72 then you plugin numbers as y and get 27x3 =81 and 81-72 is 9.
6(4.5y - 12) = 9
(4.5y - 12) = 9/6
4.5y - 12 = 1.5
4.5y = 1.5 + 12
4.5y = 13.5
y = 13.5/4.5
y = 3
- Prodixy ☕