Math problem need help urgent

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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!

let dimes be x and Nickel be y

Dimes are 12 less than double the number of nickles

therefore,  dimes x = 2y - 12

the sum of nickel and dimes (x + y  = $2.25)

replace x with (2y - 12) to be

(2y - 12) + y = 2.55

3y-12= 2.55

3y = 14.55

y= 14.55/3

y= 4.85

Hello there I am still working on your question and I might correct what i have already written, so please wait. Thanks




Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 25th, 2015

1 Dime= $0.10 ......x

1 Nickle = $ 0.05.......y

the equation is 0.1x  + 0.05y = 2.55

The number of dimes are x= 2y - 12

therefore replace x with 2y - 12

0.1( 2y-12) + 0.05y = 2.55

0.2y -1.2 + 0.05y = 2.55

0.25y = 3.75

y= 15 ( the number of nickles)

therefore, the number of dimes are;

The number of dimes are x= 2y - 12

x= 2(15) - 12

x = 30 -12

x = 18

ANS

the number of dimes are 18

I wouldn't mind a Tip :-)

Jun 25th, 2015

You can ignore first answer dear

Jun 25th, 2015

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