Math
posted by Allison .
Four girls bought a boat for $60.00. the first girl paidone half the sum of the amounts paid by the other 3. The second girl paid onethird the sum of the amounts paid by the other 3. The third girl paid onefourth the sum of the amounts paid by the other 3. How much did the fourth girl pay?
I am not sure if I am over thinking this but please help!! thanks so much

1G= 1/2(SG+TG+FG)
FG+SG+TG+FG=60
SG= 1/3(1G+TG+FG)
TG=1/4(1G+SG+FG)
Grind it out.