Answer:
D. 8x=16
Step-by-step explanation:
If y=2x, then
2x+3y=16
2x+3(2x) =16
2x +6x=16
8x=16
.
...
The answer would be 8 but I'm not that great at math try at your own risk
c
180(n-2)
180(5-2)
180(3)
540
