SOLUTION: I was given a test and I'm not sure if i answered this correctly. But the question was... You have 83 coins which consist of nickels and dimes that equal $6.95 how many of each d

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Question 538769: I was given a test and I'm not sure if i answered this correctly. But the question was...
You have 83 coins which consist of nickels and dimes that equal $6.95 how many of each do you have?
I Need to know how to do this using a systems of equations thanks(:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
You have 83 coins which consist of nickels and dimes that equal $6.95 how many of each do you have?
:
The no. of coins equation:
n + d = 83
n = (83-d); use the form for substitution
:
The value equation
.05n + .10d = 6.95
replace n with (83-d)
.05(83-d) + .10d = 6.95
4.15 - .05d + .10d = 6.95
.05d = 6.95 - 4.15
.05d = 2.80
d = 2.8%2F.05
d = 56 dimes
:
You can find the number of nickels, check your solutions in the value equation