SOLUTION: anne and nancy use a metal alloy that is 17 percent copper to make jewerly. how many ounces of a 15 percent alloy must be mixed with a 18 percent alloy to form 78 ounces of the des

Question 931809: anne and nancy use a metal alloy that is 17 percent copper to make jewerly. how many ounces of a 15 percent alloy must be mixed with a 18 percent alloy to form 78 ounces of the desired alloy?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = ounces of 15% alloy
y = ounces of 18% alloy
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x + y = 78
15x + 18y = 17*78
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put the system of linear equations into standard form
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x + y = 78
15x + 18y = 1326
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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 15% alloy = 26
y = ounces of 18% alloy = 52
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Solve and graph linear equations:
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Solve quadratic equations, quadratic formula:
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Solve systems of linear equations up to 6-equations 6-variables:
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