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02-07-2020
Mathematics

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Helpppppppppppppppppppp solve for x

Helpppppppppppppppppppp solve for x class=

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02-07-2020

Answer:

x=35

Step-by-step explanation:

Since a quadrilateral's interior angles add up to 360°, we get this:

360-85-20=360-4x+x

340-85=360-3x

255=360-3x

-105= -3x

Multiply both sides by -1

105=3x

3x=105

Divide both sides by 3

x=35

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