Curt has some change in his pocket. He has 3 quarters, 2 dimes, and some nickels. Altogether, he has $1.30. How many nickels does Curt have?
1 nickel = 5 cents = $ 0.05
1 dime = 10 cents = $ 0.10
1 quarter = 25 cents = $ 0.25
x = number of Curt´s nickels
Curt has some change in his pocket. He has 3 quarters, 2 dimes, and some nickels. Altogether, he has $1.30 means:
3 ∙ $ 0.25 + 2 ∙ $ 0.1 + x ∙ $ 0.05 = $ 1.30
$ 0.75 + $ 0.2 + x ∙ $ 0.05 = $ 1.30
$ 0.95 + x ∙ $ 0.05 = $ 1.30
Subtract $ 0.95 to both sides
x ∙ $ 0.05 = $ 0.35
x = $ 0.35 / $ 0.05 = 7