Question

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

Answer 1

1) Put 21 in for d

0.10(21)+0.05n=5.25

2) Multiply 0.10 by 21

2.1+0.05n=5.25

3) Subtract 2.1 on both sides

2.1+0.05n=5.25
-2.1 -2.1
—————————
0.05n=3.15

4) divide 0.05 on both sides

0.05n=3.15
——— ——-
0.05 0.05

n=63

THE FINAL ANSWER IS…
63 nickels