Becky has some marbles
Chris has two times as many marbles as Becky
Dan has seven more marbles than Chris
They have a total of 57 marbles
Dan says:
If I give some marbles to Becky, each of us will have the same number of marbles"
Is dan correct?
Becky - x marbles; Chris - y marbles; Dan - z marbles y = 2 x z = y + 7 x + y + z = 57 -------------------- z = 2 x + 7 x + 2 x + 2 x + 7 = 57 5 x + 7 = 57 5 x = 57 - 7 5 x = 50 x = 50 : 5 x = 10, y = 20, z = 27 Answer: Dan is not correct.
