SOLUTION: The diffrence of two supplementary angles is 72 degree.find the angles

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Question 725541: The diffrence of two supplementary angles is 72 degree.find the angles
Answer by jim_thompson5910(35256) About Me  (Show Source):
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x+y = 90
x-y = 72
--------
2x+0y = 162

2x = 162

x = 162/2

x = 81

x+y = 90

81+y = 90

y = 90-81

y = 9

The two angles are 81 degrees and 9 degrees.