During the summer, you work 30 hours per week at a gas station and earn $8.75 per hour. You also wor

During the summer, you work 30 hours per week at a gas station and earn $8.75 per hour. You also work as a landscaper for $11 per hour and can work as many hours as you want. You want to earn a total of $400 per week. How many hours, t, must you work as a landscaper?

Calculate your gas station salary:
Gas Station Salary = Hours Worked * Hourly Rate
Gas Station Salary = 30 * $8.75
Gas Station Salary = $262.50

Now subtract this from the desired weekly earnings of $400
$400 - 262.50 = $137.50

The landscaper makes $11 per hour. And they want to make $137.50 from landscaping. So we have the following equation:
11t = 137.50

Run this through our equation calculator, and we get t = 12.5 hours.