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Question

If two complementary angles are 3x+10x and 7x-20 then find measures of the angles

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Solution

As we know that sum of two complementary angles is 90 degree so, 3x+10+7x-20=9010x-10=9010x=100x=10010=10So angles are 3x+10=3×10+10=40 degreeand 7x-20=7×10-20=50 degree.

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