Question 993366
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M=monthly fee; F=initial fee
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Total cost=initial fee+(number of months)(monthly fee)
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$225=F+5M
$225-5M=F
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$375=F+10M
$375=($225-5M)+10M
$375=$225+5M
$150=5M
$30=M
ANSWER 1: The monthly fee is $30.
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$225=F+5M
$225=F+5($30)
$225=F+$150
$75=F
ANSWER 2: The initial fee is $75
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CHECK:
$375=F+10M
$375=$75+10($30)
$375=$75+$300
$375=$375