Question

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Answer 1

Answer:

29 nickels, 12 dimes

If the number of nickels is 7 less than three times the number of dimes, the answers should be 29 nickels and 12 dimes. Hope it helps!

Answer 2

Answer:

dimes = $2.41

nickels = $0.24

Step-by-step explanation:

given:

A piggy bank contains $2.65 in nickels and dimes.

If the number of nickels is 7 less than three times the number of dimes,

find:

how many of each kind of coin are there?

solution;

total = $2.65 = d + n

let d = dimes

    n = nickels

nickels = 3d - 7

plugin values into the formula:

2.65 = d + 3d - 7

2.65 + 7 = 4d

d = 9.65

        4

d = $2.41

nickels = 3d - 7

            = 3(2.41) - 7

         n = $0.24