Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10d + 0.05n = 5.25, where d represents the number of dimes and n represents the number of nickels. If Sonji has 21 dimes, how many nickels does she have?

Guest Aug 4, 2017

#1**+1 **

Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10d + 0.05n = 5.25, where d represents the number of dimes and n represents the number of nickels. If Sonji has 21 dimes, how many nickels does she have?

.10 (21) + .05 n = 5.25

2.10 + .05n = 5.25 subtract 2.10 from both sides

.05n = 3.15 divide both sides by .05

n = 3.15 / .05 = 315 / 5 = 63 nickels

CPhill
Aug 4, 2017