Question

connor and lily are making bags of trail mix. connor puts 7 pretzels in each bag and lily puts the same unknown number of raisins, r, in each bag. after filling 3 bags, they have used 45 items. keep going to solve for r. you can solve on paper or you can choose to show your work below. then, enter your answer on zearn. 3(7 + r) = 45 r = \square

Explanation:

Step1: Divide both sides by 3

$\frac{3(7 + r)}{3} = \frac{45}{3}$
Simplify to get: $7 + r = 15$

Step2: Subtract 7 from both sides

$7 + r - 7 = 15 - 7$
Simplify to isolate $r$.

Answer:

$r = 8$