# math

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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.

• math -

6 weeks

• math -

It is 5 weeks.
5x+60=y
5x+135-15x=y
set equations equal to each other to see when they will have the same amount in each situation
5x-5x+15x=135-60
15x=75
x=75/15=5

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