SOLUTION: A farmer has 500$, He has to buy 100 animals. A cow costs 10, pig costs 1, and horse costs 50. You need to buy one of each at least.

Question 829051: A farmer has 500$, He has to buy 100 animals. A cow costs 10, pig costs 1, and horse costs 50. You need to buy one of each at least.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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x = cows
y = pigs
z = horses
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x + y + z = 100
10x + y + 50z = 500
z = 1
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copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = cows = 39
y = pigs = 60
z = horses = 1
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NOTE:
the problem statement says to "buy one of each animal at least", so I started with x=1, but that gave a fractional number of animals, then I tried y=1 and that too gave a fractional number of animals, finally I tried z=1, which gave the integer number of animals shown in the solution.
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Solve and graph linear equations:
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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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