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The equation that can be used to determine the cost of a bag of potatoes is $31.69 - $4.09 = 4x
The cost of a bag of potatoes is $6.90
Solving an Equation
From the question, we are to write and solve an equation that could be used to determine x, the cost of a bag of potatoes
From the given information,
Serenity buys milk and potatoes at the store and she pays a total of $31.69
and
She pays a total of $4.09 for the milk
Thus,
The amount she pays for potatoes is $31.69 - $4.09
Also, from the information,
"She buys 4 bags of potatoes that each cost the same amount"
If x represent the cost of a bag of potatoes, then we can write that
$31.69 - $4.09 = 4x
This is the equation that can be used to determine the cost of a bag of potatoes
Now,
Solve the equation for x
$31.69 - $4.09 = 4x
$27.60 = 4x
x = $27.60/4
x = $6.90
Hence, the cost of a bag of potatoes is $6.90
Learn more on Calculating cost here: https://brainly.com/question/27887972
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