HELP!! Algebra homework!??
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HELP!! Algebra homework!??

[From: ] [author: ] [Date: 11-09-21] [Hit: ]
How many five dollar bills does he have?? WHAT ARE THE STEPS?Now that you have the equations, you can solve for y.Check it and make sure it works.......
Tim has $315 in five and tend dollar bills, the number of tens is 21 less than 7 times the number of fives.How many five dollar bills does he have?? WHAT ARE THE STEPS?

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Write initial equation:
315 = 10x + 5y

Put the # of tens into equation: "the number of tens is 21 less than 7 times the number of fives"
10x = (5y)7 - 21

Plug in:
315 = ((5y)7 - 21) + 5y

Now that you have the equations, you can solve for y. Check it and make sure it works.
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