Problema Solution
I have twice as many nickels as quarters. If the coins ar worth $4.90, how many quarters are there?
Answer provided by our tutors
number of nickels = 2x.
So quarters = x.
x*0.25+2x*0.05 = 4.9.
=> 0.25x+0.1x = 4.9.
=> 0.35 = 4.9.
=> x = 4.9/0.35 = 14.
There are 14 quarters.