At a concession stand, a pickle and two bags of chips costs a total of $3.25. Three pickles and four bags of chips costs a total $7.25. To determine the cost of one pickle, Kevin is writing a system of equations. His first equation is shown: x+2y=3.25

P + 2c = 3.25 Start with these two equations

3p + 4c = 7.25

p = - 2c + 3.25 Solve for one variable

3 (-2c + 3.25) + 4c = 7.25 Substitute

-6c + 9.75 + 4c = 7.25

-2c = - 2

c = 1

p + 2 (1) = 3.25 Substitute

p + 2 = 3.25

p = 1.25

A bag of chips costs $1

A pickle costs $1.25