Answer: Im pretty sure it is D
Step-by-step explanation: I don't really know how to explain it.
I hope it helps tho ;)
Tell me if im wrong.
The correct answer is A because when you solve everything in this equation, it comes out to 7=7=7=7=7, so this is correct. Just use your calculator to solve these.
Supplementary angles always equal 180. Then you just solve from there.
7x+5x+24=180
12x+24=180
-24 -24
12x=156
/12 /12
X=12