It is convenient to let a calculator do the math.
.. (x, y) = (0, 3) . . . . . your 3rd selection
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I prefer using the RREF function to put the augmented matrix into reduced row-echelon form. If the equations are dependent or inconsistent, using that method tells you so without giving a matrix inversion error.
Answer:
45:40
Step-by-step explanation:
You take the first time and divide 60 by that number (60/4=15) Then you multiply it by the numbers of shoes being created (3*15=45) Repeat this for the other part and you have your answer
I think it's 0.385. I might be wrong. Try using WolframAlpha for this stuff, it should work.