MATH SOLVE

2 months ago

Q:
# Emily has 8 coins in her purse totaling 50 cents. The only kinds of coins she has are nickels and dimes. How many nickels does Emily have?

Accepted Solution

A:

5x + 10y = 50

x + y = 8

x = 8 - y

5*(8-y) + 10y = 50

40 - 5y + 10y = 50

10y - 5y = 50 - 40

5y = 10

y = 2

x + y = 8

x + 2 = 8

x = 8 - 2

x = 6

She has 6 nickels and 2 dimes

x + y = 8

x = 8 - y

5*(8-y) + 10y = 50

40 - 5y + 10y = 50

10y - 5y = 50 - 40

5y = 10

y = 2

x + y = 8

x + 2 = 8

x = 8 - 2

x = 6

She has 6 nickels and 2 dimes