Question 399682
John earned $240 in the summer by working at a fast food restraunt and baby-sitting. If he earned five times as much in the restraunt as he did baby-sitting, how much did he earn at each job? 
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if you have two unknowns, you'll need two equations.
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Instead:
Let x = amount earned baby-sitting
then from "he earned five times as much in the restraunt as he did baby-sitting" we have
5x = amount earned in restaurant
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x + 5x = 240
6x = 240
x = $40 (baby-sitting)
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restaurant:
5x = 5(40) = $200