Amy, Ruben, and Sam have a total of $71 in their wallet. Sam has 3 times what Reuben has. Reuben has $9 more than Amy. How much do they have in their wallets?

Total = amount Amy has (A) + amount Ruben has (R) + amount Sam has (S)

S = 3 * R

R = A + 9

S = 3 * (A+9)

S = 3A + 27

71 = A + (A + 9) + (3A + 27)

71 = 5A + 36

5A = 35

A = $7

R = A + 9

R = 7 + 9

R = $16

S = 3 * R

S = 3 * 16

S = $48