Question

I have G dollars in my bank account. I spend 1/3 of my money on an Xbox and $20 on an Xbox controller. How much

money do I have remaining in my account?

Answer 1

For this case we have:

G: Let the variable representing the amount of initial money in the account.

If you spend
`\frac {1} {3}`of G then we have:

`G (1- \frac {1} {3}) = G (\frac {3-1} {3}) = \frac {2} {3} G`

Then spend $20, then we have:

`\frac {2} {3} G-20`

Finally, the expression that represents the money left in the account is:

`\frac {2} {3} G-20`

Answer:

`\frac {2} {3} G-20`