Respuesta :

Answer:

x = 91

Step-by-step explanation:

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

Sum the 4 angles and equate to 360, that is

x + 10 + x - 10 + x + 6 + x - 10 = 360 , then

4x - 4 = 360 ( add 4 to both sides )

4x = 364 ( divide both sides by 4 )

x = 91

Answer:

I wish I could answer better, but the bets I can do is that 81<x<99

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