Question

A pile of 55 coins consists of nickels and dimes is worth 3.90. If there are x nickels, what is the equation?

Answer 1

I set up and solved this equation.

.05x + .10(55 - x) = 3.90

.05x + 5.50 - .10x = 3.90

5.50 - .05x = 3.90

.05x = 1.60

x = 32

32 nickels, 23 dimes