Answer
3 bottles
Work Step by Step
(Let n be the number of bottles of olive oil we can purchase. Each bottle costs 7 dollars, so multiply n by 7. Since you have a 5 dollar coupon, you can subtract 5 from the cost. You have 16 dollars so set the equation equal to 16.)
$7n-5=16$
(Add 5 to both sides)
$7n=21$
(Divide by 7)
$n=3$
