Xuxian and Rachel had the same number of marbles. After Rachel gave away 10 marbles and Xuxian gave away 22 marbles, Rachel had 3 times as many marble as Xuxian. How many marbles did each of them have at first
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Expert's answer
2013-02-07T08:31:43-0500
Let Xuxian and Rachel had X and R marbles first time. Then we can write down the system of equations:
X = R, R - 10 = 3(X - 22).
Let's solve it. Substituting the first equation into the second one we obtain:
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