Answer:
I believe this is right. Answer: 6/7
Step-by-step explanation:
5+1 = 6
The denominator stays the same.
Answer:
The value of variable r in the equation
is 
Step-by-step explanation:
We need to find the value of variable r in the equation 
Step 1: Write the equation

Step 2: Subtract 4 on both sides

Step 3: Divide both sides by 4

So, The value of variable r in the equation
is 
You have $15 and admission is $5, so you know have $10 before doing any games. If you wanted to play 12 games, you would need $10.20, which you do not have. But, if you wanted to play 11 games, then you would need $9.35, which is just under $10.
So the maximum amount of games that you could play would be 11 games.