Math
posted by Patrice
David and Sam had an equal number of marbles. After Sam gave 50 marbles to David, he had 5x as many marbles as Sam. Find the total number of marbles they had.

Reiny
David's marbles  x
Sam's marbles x
After Sam lost his marbles:
Sam  x50
David  x+50
x+50 = 5(x50)
x+50 = 5x  250
4x = 300
x = 75
they had 75+75 or 150 marbles between them
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