Rebecca has left three bags containing the same number of marbles, plus two marbles left over. She places them on one side of a balance. Chris, who has more marbles than Rebecca, adds marbles to the other side of the balance. He finds that with 29 marbles, the scale balance. How many marbles are in each bag?Assume the bags weigh nothing.
let x = # marbles in bag.
3x + 2 = 29
Solve for x.posted by PsyDAG
number of marbles in each bag --- x
3x + 3 = 29
each bag has 9 marbles
Go with PsyDAG's solution, I hit the 3 key instead of the 2