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Since the angles are complementary, their measures add up to 90 degrees.
So, the equation for the angle measures is:
(2x + 3) + 2x = 90
Solving this equation:
2x + 3 + 2x = 90
4x + 3 = 90
4x = 87
x = 21.75
So, 2x equals 2(21.75) = 43.5.