Question

ra has 28¢ in his pocket. He has 20 coins that are either pennies or nickels. How many nickels does Ira have? Explain and show your work. *

Answer 1

how many cents are there in a nickel and a penny.? (i'm from the UK)

Answer 2

a penny is one cent and a nickle is 10 cents

Answer 3

oops nicke is 5 cents

Answer 4

ok so if there are x pennies and y nickels then we have the equation
x + 10y = 28

Answer 5

x + 5y = 28

Answer 6

thank you

Answer 7

now we have to fit while numbers to that equation

Answer 8

okay

Answer 9

oh also he has 20 coins so that is
x + y = 20

so we need to solve
the system

x + y = 20
x + 5y = 28

Answer 10

now if we subtract equation 1 from equation 2 the x will disappear and w'ell get 4y = 8

Answer 11

so first i would multiply then add right?

Answer 12

okay

Answer 13

you have 4 times the number of nickels = 8
so divide by 4