SOLUTION: 1. Amy's grandmother's age is divided by 15 is 5. How old is her grandmother? 2. Your mom bought you a 1 year swimming pass for $390. She's making 12 payments of how much money

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Question 259739: 1. Amy's grandmother's age is divided by 15 is 5. How old is her grandmother?
2. Your mom bought you a 1 year swimming pass for $390. She's making 12 payments of how much money to pay for the pass?

Answer by Stitch(470) About Me  (Show Source):
You can put this solution on YOUR website!
1. Let Grandmother's age = X
The Equation: X+%2F5+=+15
Multiply both sides by 5
5+%2A+X+%2F+5+=+15+%2A+5
Simplify the equation
highlight%28X+=+75%29
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2. Total cost = $390
She is making 12 payments
The equation
X+=+%24390+%2F+12
highlight%28X+=+32.5%29
She is paying $32.5 each time