Question

Travis buys 4 bags of M&Ms and a bottle of water. The total cost was $10.75. If the bottle of water cost $1.75, which equation can be used to determine the cost of one bag of M&ms?

Answer 1

Let's call x each bag of M&M, and y each bottle of water. If they cost $10.75, we can express the following

`4x+y=10.75`

If the bottle of water costs $1.75, then we can replace it to find x

`\begin{gathered} 4x+1.75=10.75 \\ 4x=10.75-1.75 \\ 4x=9 \\ x=(9)/(4)=2.25 \end{gathered}`

Hence, each bag of M&Ms cost $2.25.