the coin jar was filled with pennies an nickles in the ratio of 7 to 2. if there 28 nickles . how many coins were there
Pennies : nickels - 7:2 = 7x : 2x
given: 2x = 28
x = 14
so you had 28 nickels and 7(14) or 98 pennies, for a total of 9x or 126