Answer:
Answer is x= 30
Explanation:
x = 30°
Angles on a straight line add to 180° so
3x + 36 + 54 = 180
( Simplify )
3x + 90 = 180
( Minus 90 from both sides to isolate 3x )
3x = 90
( Divide both sides by 3 to isolate x )
x = 30
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