Answer:
x = 22
Step-by-step explanation:
triangle = 180 degrees
2x + 12 + x + 54 + 3x - 18 = 180 degrees
combine like terms
6x + 12 + 54 - 18 = 180
6x + 48 = 180
-48 -48
6x = 132
divide by 6
x = 22
Hope this helped! Have a nice rest of ur day! Plz mark as brainliest!!!
-Lil G
