SOLUTION: The equation x+(x+10)=90 is used to describe a pair of complementary Angles what is the value of x?

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Question 969182: The equation x+(x+10)=90 is used to describe a pair of complementary Angles what is the value of x?
Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!

by definition, Complementary Angles add up to 90°.
if you are given x%2B%28x%2B10%29=90 means one angle is x and its complement is x%2B10
so, we need to solve x%2B%28x%2B10%29=90 for x
x%2Bx%2B10=90
2x=90-10
2x=80
x=80%2F2
x=40°.....one angle
x%2B10=40%2B10=50°....its complement