Math problem need help urgent

Mathematics
Tutor: None Selected Time limit: 1 Day

Logan has $2.55 in dimes and nickles. How many dimes does he have if there are 12 less than double the number of nickles

Jun 25th, 2015

Thank you for the opportunity to help you with your question!

1 Nickel = 5 cents

1 dime = 10 cents

$1 = 100 cents

1 dime = 2 Nickel

Number of dimes = 2*Number of nickels - 12

Lets represent -

Number of dimes = d

Number of nickels = n

therefore, d = 2n-12

so, d+n = $2.55

or, 10*d + 5*n = 255 cents .....................(covert both sides into number of cents)

or, 10*(2n-12) + 5n = 255

or, 20n-120+5n = 255  => 25n = 375    => n = 15

therefore, d = 2n-12 = 2*15-12 = 18

Number of dimes = 18

Number of Nickels = 15




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Jun 25th, 2015

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