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There are probably a couple of ways to do this, but I chose multiplying it out in polynomial form to start with.
(2z-2)(z+3)=0 ( I think it's the distributive law(I know it's one of the laws...) for the multiplication that's done, to make it a polynomial.)
C = Charlie,
X = Quarters
C = X (Charlie has X quarters)
T = X+3 (Ty has 3 more quarters than Charlie)
V = 2(X+3) or simplified 2(T) where T is the amount of quarters Ty has. Vinnie has twice as many quarters as Ty.
So, how many quarters do they...