Question

Brielle’s piggy bank has all nickels and dimes. The total value of the money in her piggy bank is $7.80. If Brielle

has 66 nickels, write and solve a linear equation to find the number of dimes she has.

Answer 1

45 dimes

66 x 0.5 = 3.3

7.80 - 3.3 = 4.5

4.5/0.10 = 45

45 dimes

Answer 2

66n + d = 7.80 let n represent nickels and d represent dimes. Since you know nickels is 5 cents n would equal .05 so you would do 66(.05) and you get 3.3. Then subtract 3.3 from 7.8 and d equals 4.5.