Posted by **Jenna** on Saturday, June 2, 2007 at 11:58am.

Tyrone has $60 and his sister has $135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional $10 each week. After how many weeks will they each have the same amount of money?

Tyrone starts with 60.

Sister starts with 135.

Each receives $5/week. Let w = weeks.

Tyrone will have

60 + $5*w after w weeks.

Sister will have 135 + $5*w - $5*w - $10*w.

Set them equal and solve for w. Post your work if you get stuck.

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