Question 985648
Complementary angles add up to 90°


x = an angle
4x - 25 = its complementary angle


x + 4x - 25 = 90 {added the two angles and set equal to 90}
5x - 25 = 90 {combined like terms}
5x = 115 {added 25 to each side}
x = 23 {divided each side by 5}
4x - 25 = 67 {substituted 23, in for x, into 4x - 25}


23° and 67° are the two complementary angles
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