Let b= gallons of butterfat in the butterfat

Let m= gallons of butterfat in the milk

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You need to start by making (at least) 2 equations.

You know that gallons of b and gallons of m added together makes 50 g, so first equation is:

b+m= 50

Now you have to convert 25%, 3.5%, and 12.5% into decimals and put them into an equation:

.25b + .035m = .125

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Next, you have to solve for either variable.

There are many ways to do this such as sustitution, combination, graphing, etc.

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I hope this helps!! 🙂

m = milk

You have to change the percentages to decimals to write the system of equations:

c + m = 50

0.25c + 0.035m = 0.125

Solve the equations using substitution, elimination, or graphing. When I used graphing, I got m = 57.56 and c = -7.56… a little strange to be getting a negative number, but that’s how it seemed to work out.