SOLUTION: See Clear window cleaner is 20% vinegar and Spot Free window cleaner is 40% vinegar. How much of each should be used to make 120 oz of a cleaner that is 35% vinegar?

Question 928584: See Clear window cleaner is 20% vinegar and Spot Free window cleaner is 40% vinegar. How much of each should be used to make 120 oz of a cleaner that is 35% vinegar?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = ounces of 20% cleaner
y = ounces of 40% cleaner
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x + y = 120
20x + 40y = 35*120
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put the system of linear equations into standard form
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x + y = 120
20x + 40y = 4200
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = ounces of 20% cleaner = 30
y = ounces of 40% cleaner = 90
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
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