Kayla purchased 5 large sodas at the movie theater. Before tax was added, the total cost of the 5 sodas was equal to the coast of 3 sodas plus $7. What was the cost of one soda, s?

Answer 1

Let x be the cost of one soda.
The total cost of 5 sodas is 5x.
The total cost of 3 sodas plus $7 is 3x + $7.
The cost of 5 sodas equals the cost of 3 sodas plus $7:
5x = 3x + $7.
Subtract 3x from both sides of the equation:
2x = $7.
Divide both sides of the equation by 2:
x = $7 / 2.
The cost of one soda is $3.5. Answer: \boxed{3.5}.