Answer:
x=72
Step-by-step explanation:
This is a straight line so
x+y = 180
x = 2n+12 and y = 3n+18
2n+12 +3n+18 = 180
Combine like terms
5n+30=180
Subtract 30 from each side
5n+30-30 = 180-30
5n =150
Divide by 5
5n/5 =150/5
n = 30
Angle x =2n+12
= 2(30)+12
= 60 +12
=72
