Algebra Angles A, B, Cand D are angles in a quadrilateral. Find the measure of the unknown angle m< C m< D m< C m< A m< B 1 X 2x 3x 4x 2 3x + 10 7x 6x + 12 4x + 18 16 108 3 9x +10 9x + 20 9x + 30 3x + 30 4 9x +40 x + 30 7x + 30 8x + 35 5 3x +70 3x + 70 32x + 70 2x + 70

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