Answer: (0.25 x 7) + 3x = 2.05 and $0.10 per piece of gum
Explanation:
Jeff purchased 7 gumballs for $0.25 each, which is

Jeff then purchased 3 pieces of gum, but we don't know for how much so the cost becomes
and then

The final cost then comes down to $2.05, therefore
and solve for
to find the cost of each piece of gum


