# Math

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Andrew has 12 coins, all dimes and nickels, and they add up to \$1.00. How many nickels does he have?

• Math -

d = number of dimes
n = number of nickels

d + n = 10
.10d + .05n = 1.00

Solve the first equation for n or d and substitute it into the second equation.

• Math -

7 quarters 3 dimes and 3 nickels

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