Question

Sally has seven times as many dimes as nickels. Their value is $3.00. How many nickels does she have?

Answer 1

Sally has `28` dimes and `4` nickels.

Explanation:

`1` dime `=10` cents, `1` nickel `=5` cents, `$1=100` cents,

Let Sally has `7 x` dimes and `x` nickels ,then

`7 x *10 + x *5= 3*100 or 70 x+5 x = 300` or

`75 x =300 :. x=300/75= 4 :. 7x= 7*4=28`. So Sally has

`28` dimes and `4` nickels. [Ans]