You are saving money for a new phone. You must have at least $800 saved up in order to be able to purchase the newest IPhone. So far you have saved $215 and
earn $15 per hour working at your part time job. Write and solve an inequality to
determine the least amount of hours you must work in order to reach your goal.

Let number of hours needed to work = x

Multiply number of hours by rate: 15x

Add what you already have saved:

15x + 215

This needs to equal at least 800:

The equation becomes:

15x + 215 >= 800

Solve for x:

15x + 215 >= 800

Subtract 215 from both sides

15x >= 585

Divide both sides by 15

X >= 39

They have to work at least 39 hours.