Geometry, angle A and angle B are complementary. Find angle A and angle B?

I

island girl

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PROBLEM 45
angle A = 5x +8
angle B = x + 4

PROBLEM 46
angle A = 3x + 7
angle B = 11x - 1

PROBLEM 47
angle A = 8x - 7
angle B = x - 11

PROBLEM 48
angle A = 3/4x - 13
angle B = 3x - 17
 
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