Katherine bought snacks for her team's practice. She bought a bag of chips for $2.70 and a 12-pack of juice bottles. The total cost before tax was $15.78. Write and solve an equation which can be used to determine xx, how much each bottle of juice cost.
Let x be the cost of each juice bottle.
The total cost of the chips and juice is:
$2.70 + 12x = $15.78
Subtracting $2.70 from both sides:
12x = $15.78 - $2.70
Combining like terms:
12x = $13.08
Dividing both sides by 12:
x = $13.08 / 12
Simplifying:
x = $1.09
Therefore, each bottle of juice costs $1.09.