Daniel L. answered • 03/17/16

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Hi Eshal,

Don't lose your marbles.

Let X = the number of marbles that Juan or Rachel started with.

Rachel gives away 10 marbles--> X - 10 and Juan gives away 22--> X - 22

Than Rachel has 3 times as many marbles as Juan--> X-10 = 3(X-22)

X - 10 = 3X - 66

-56 =- 2X

X = 28

Plug this back into the problem to make sure it works.

Have fun.

Dan