SOLUTION: Sam earns $5 hour babysitting and $8 hour doing yardwork. One week, he works 18 hours and earns $126. How many hours did he babysit?

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Question 1012846: Sam earns $5 hour babysitting and $8 hour doing yardwork. One week, he works 18 hours and earns $126. How many hours did he babysit?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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B=babysitting; Y=yard work
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B+Y=18
B=18-Y
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$5B+$8Y=$126
$5(18-Y)+$8Y=$126
$90-$5Y+$8Y=$126
$3Y=$36
Y=12
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B=18-Y=18-12=6
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ANSWER: He babysat 6 hours.
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CHECK:
$5B+$8Y=$126
$5(6)+$8(12)=$126
$30+$96=$126
$126=$126
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