$\"\"$

The total cost $\"\"$ in dollars to go to a water park and ride $\"\"$ water rides.

The equation is $\"\"$ .

The total cost was $\"\"$ .

Find how many water rides were ridden.

$\"\"$ (Original equation) \ \

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Subtract $\"\"$ from each side)

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Divide each side by $\"\"$ )

$\"\"$ (Cancel common terms) \ \

Therefore, $\"\"$ number of rides were ridden. \ \

$\"\"$

Option A is rght choice.