SOLUTION: If ∠ABC and ∠DEF are complementary, the measure of ∠ABC =3x+7 and the measure of ∠DEF = 20 solve for x

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Question 1186717: If ∠ABC and ∠DEF are complementary, the measure of ∠ABC =3x+7 and the measure of ∠DEF = 20 solve for x
Answer by Alan3354(69443) About Me  (Show Source):
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If ∠ABC and ∠DEF are complementary, the measure of ∠ABC =3x+7 and the measure of ∠DEF = 20 solve for x
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ABC + DEF = 90
3x+7 + 20 = 90
etc