The cost of a ticket to an amusement park was increased by 4 dollars. The new cost is twenty-eight dollars.

a. Write a one-step equation that could be solved to find the old price. Let p represent the old price.
b. Solve the equation you wrote in Part a. Show all your work.
c. Explain how you know that the solution you found in Part b is the correct answer.

Question

The cost of a ticket to an amusement park was increased by 4 dollars. The new cost is twenty-eight dollars.

a. Write a one-step equation that could be solved to find the old price. Let p represent the old price.
b. Solve the equation you wrote in Part a. Show all your work.
c. Explain how you know that the solution you found in Part b is the correct answer.

solomonzelman · Answer

I would just what is the price of an old ticket... I mean common !

Anyway, for part A
p+4=28

Can you solve this equation? (hint: subtract 4 from each side)

and for mart c, plug in whatever you get into the original equation (in part A) and check.