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Mathematics 7 Online
OpenStudy (anonymous):

OpenStudy (anonymous):

if they are complementary then their sum must add to 90 3x+7+6x+20=90 9x+27=90 9x=63 x=7 now sub this value to get m<X m<X=3(7)+7=28 degrees m<Y=90-28=62 (since complementary) or m<Y=6(7)+20=42+20=62 (using given equation) Answer: m<X=28; m<Y=62

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