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Answer:
x = 59
Step-by-step explanation:
since the quadrilateral add up to 360 degrees,
X + X + (2x + 3 ) + (2x + 3) would equal 360 degrees
x + x + (2x + 3) + (2x + 3) = 360
6x + 6 = 360, addtion
6x = 354, subtraction
x = 59, division