Respuesta :

Answer: x=6

Step-by-step explanation: (x+54)+5x=90 -> 6x+54=90 -> 6x=36 -> x=6

you know it equals 90 because it's on a 180 and there's a right angle.

simplify the equation to 6x+54=90, subtract 54 from 90, and divide by 6 to isolate x.

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