Step-by-step explanation:
( vertically opposite angles)
Answer:
A
Step-by-step explanation:
I think your right!
Add all sides.
5x+2+3x+8+4x-1
Combine like terms
12x+9
Subtract nine to get it on the other side of the equal sign
12x= -9
Divide by twelve
x=-9/12
Simplify
x=-3/4
Plug in x.