Question #5 - Solve the equation.

Question

SpongeBob and Patrick went to a party at the Pineapple House. They each got a ticket for the Roller Coaster. SpongeBob got a Krabby Patty, and Patrick got a Krusty Krab Pizza. SpongeBob had a certificate for $7 off the cost. Patrick paid the rest, which came to $15. Each Roller Coaster ticket was $3, and a Krabby Patty was $5. What was the cost for Krusty Krab Pizza?

Answer 1

Let's set up the equation to solve for the cost of the Krusty Krab Pizza.

Let x be the cost of the Krusty Krab Pizza.

SpongeBob paid $5 for the Krabby Patty and received a $7 discount for the Roller Coaster ticket. Therefore, SpongeBob paid $3 for the ticket ($5 - $7).

Patrick paid the remaining cost, which was $15.

The total cost for both SpongeBob and Patrick would be SpongeBob's cost for the ticket plus Patrick's cost for the ticket plus Patrick's cost for the Krusty Krab Pizza.

So, (SpongeBob's ticket cost) + (Patrick's ticket cost) + (Patrick's Krusty Krab Pizza cost) = Total cost

Plugging in the known values, we get:

$3 + $3 + x = $15

Combining like terms, we have:

$6 + x = $15

Now, we can solve for x by subtracting $6 from both sides:

x = $15 - $6

x = $9

Therefore, the cost for the Krusty Krab Pizza is $9.