Question

Marie uses 2.3 oz of nuts for each bag of trail mix she makes. She uses 27.6 oz of nuts in all. How many bags of trail mix does Marie make?

Answer 1

27.6/2.3 = 12 bags of trail mix

Answer 2

2.3 oz per bag, so for x bags you have 2.3x oz total.
The total amount is given as 27.6 oz, so you have 27.6=2.3x.
set equation $27.6=2.3x$
simplify by dividing both sides by 2.3 $\frac{27.6}{2.3}=\frac{2.3x}{2.3}$
solution: $x=\frac{27.6}{2.3}=12$