3 years ago

Solve for x does anyone know how to do this?

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

6 0

Answer:

x = 9

Step-by-step explanation:

The sum of the 4 angles in a quadrilateral = 360°

Sum the given angles and equate to 360

90 + 109 + 9x - 5 + 85 = 360, that is

9x + 279 = 360 ( subtract 279 from both sides )

9x = 81 ( divide both sides by 9 )

x = 9

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