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angle a and b are complementary angles. if angle a =2x degrees and angle b= 3x+15 degrees, what is the value of x?
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angle a and b are complementary angles. if angle a =2x degrees and angle b= 3x+15 degrees, what is the value of x?

User Techstack
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1 Answer

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Note that complementary angles add up to 90°

So,

(3x + 15) + 2x = 90°

Remove the parentheses:

3x + 15 + 2x = 90

Combine like terms:

5x + 15 = 90

Subtract 15 on both sides:

5x = 85

Divide 5 on both sides:

x = 17


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User Sambro
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