Question

You have $55 in your bank account, and you would like to buy a new phone for $395. You can save $5 for each hour you work. How many hours must you work to buy it?

Answer 1

(At least) 68 hours

Explanation:

So we already have $55 in our bank account.

And we earn $5 per hour.

In other words, the total amount of money in our account after working x hours is represented by the equation:

`y=5x+55`

We want to buy a new phone that costs $395. To find out how many hours we need to work, substitute 395 for y. Thus:

`395=5x+55`

Subtract 55 from both sides:

`340=5x`

Divide both sides by 5:

`x=68`

Therefore, we must work for (at least) another 68 hours in order to earn enough money to purchase the phone.