Susie emptied and old piggy bank that she forgot she had and found $6.30 in nickels and dimes if there is a total of 90 coins, how many nickels does she have?

Answer 1

You can either do this with 2 variables or one.
In one variable you have the equation... Let x represent the nickels, so there are 90-x dimes
.05x + (90-x)(.10) = 6.30
Solve for x

Answer 2

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