Question

Kaelyn has 14 coins that have a value of $1.20. She only has dimes and nickels. How many nickels does kaelyn have?

Answer 1

Respuesta:

14 coins

y = ?

(1) 0,10 x + 0,05 y = 1,20

(2) x + y = 14

Solving for x of (2)

x = 14 - y (3)

Replacing (3) in (1)

0,10(14 - y) + 0,05y = 1,20

1,4 - 0,1y + 0,05y = 1,20

0,05y = 0,2

y = 4

x = 14 - y

x = 14 - 4

x = 10