SOLUTION: what is the way to solve x+2y=1 and 3x-y=10 by using the Cramer's rule

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Question 938474: what is the way to solve x+2y=1 and 3x-y=10 by using the Cramer's rule
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=%28matrix%282%2C2%2C1%2C2%2C3%2C-1%29%29
abs%28A%29=-7
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A%5Bx%5D=%28matrix%282%2C2%2C1%2C2%2C10%2C-1%29%29
abs%28A%5Bx%5D%29=-21
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A%5By%5D=%28matrix%282%2C2%2C1%2C1%2C3%2C10%29%29
abs%28A%5By%5D%29=7
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=-21%2F%28-7%29=3
y=abs%28A%5By%5D%29%2Fabs%28A%29=7%2F%28-7%29=-1