Question 170408: I do not know where to start on this one, please help me. John has $1.70 in nickels and dimes. He has 5 more dimes than nickels. With that said, how many nickels does he have?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! I do not know where to start on this one, please help me. John has $1.70 in nickels and dimes. He has 5 more dimes than nickels. With that said, how many nickels does he have?
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N = # of nickels
D = # of dimes
D = N + 5 (he has 5 more dimes than nickels)
5N + 10D = 170 (they add to $1.70)
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Now there are 2 eqns in 2 unknowns. My dog can solve those. (OK, he only did one, and it might have been luck.)
Sub for D in the 2nd eqn
5N + 10*(N+5) = 170
5N + 10N + 50 = 170
15N = 120
N = 8
D = N+5 = 13
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