Answer:
Option B
Step-by-step explanation:
n = all real numbers
7n+12=1/2(14n+24)
multiply each side by 2
2(7n+12)=2*1/2(14n+24)
distribute
14n+24 = 14n + 24
subtract 14n from each side
14n-14n+24 = 14n-14n + 24
24=24
this is always true
Answer: 132 degree
X + 48 = 180
X = 180 - 48
X = 132 degree