Anthony had twice as much money as Russell, but after Anthony gave $35 to Russell, Russell had 3 times as much money as Anthony. How much money did Russell have at the start?

Let *A* and *R* represent the amounts of money that Anthony and Russell, respectively, started with.

*A*= 2

*R*and

*R*+ 35 = 3(

*A*– 35) →

*R*+ 35 = 3

*A*– 105

*R*+ 35 = 3(2

*R*) – 105 = 6

*R*– 105 →

*R*= 6

*R*– 140

5

*R*= 140 →

*R*= 28, and

*A*= 56.

Check:

28 + 35 ≟ 3(56 – 35)

63 = 3(21)

63 = 3(21)