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During the summer, you work 30 hours per week at a gas station and earn $7.75 per hour. You also work as a landscape for $12.50 per hour and can work as many hours as you want. You want to earn a total of $400 per week. How many hours must you work as a landscaper?

Answer :

30 hours($7.75) + $12.50x = $400
$232.50 + $12.50x = $400
$12.50x = $400 - $232.50
$12.50x = $167.50
Divide both sides by $12.50
x = $13.4 hours

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