Question 190308
Let x represent the smaller angle.
Then the larger one is 2x + 54.

As the sum of the measures of the two angles is 90, we have 
x + 2x + 54 = 90

Solving for x, we have
3x + 54 = 90
3x = 90-54
3x = 36
x = 12
So the smaller angle is 12 degrees
The larger one is 2x + 54 = 2x12 + 54 = 78 degrees