Answer :
Set up an algebraic equation. This is what it looks like based on what the question tells you:
Let a = area of pentagon
a+27 = 4a-15
3a-15 = 27
3a = 42
a = 14
Let a = area of pentagon
a+27 = 4a-15
3a-15 = 27
3a = 42
a = 14