Question 548902
Two angles are complementary so they total 90 degrees. 
They can be defined as x and 90-x.
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90-x + 1/2*x = 81.5
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Multiply by 2 to eliminate fraction.
180 -2x +x = 163
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-x = -17
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x = 17
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90 -x = 73
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Check the relationship.
73 + 1/2*17 = 73 + 8.5 = 81.5
Correct.
.
Done.