The measure of two supplementary angles are in ratio of 5:7. What is the measure of each angle?

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A simple way of setting this up is by putting the problem as 5x : 7x. Since there are 12 parts (5 + 7) You would do 180 divided by 12. You should get 15 for x. Then to find each angle you would do 5 times "15" for the first angle, and 7 times "15" for the second angle. You should get 75 for the first angle measure and 105 for the second angle measure.