Question 668692
What does it mean if x,y are complementary? That means x+y = 90 by definition.

Let x be one angle. Let y be the other angle.

We know that y = 18+2x

Then  x + 18 + 2x = 90

3x = 72

x = 24

If x = 24, then 24+y = 90  y = 66

24,66