I need help with a puzzle
1 answer:
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Explanation:
Basically, you can do it in many ways. But just, in my opinion, exactly linear algebra was made for such cases.
the optimal way is to do it with Cramer's rule.
First, find the determinant and then find the determinant x, y, v, u.
Afterward, simply divide the determinant of variables by the usual determinant.
eg. and etc.
I think that is the best way to solve it without a hustle of myriad of calculations reducing it to row echelon form and solving with Gaussian elimination.
First you need to simplify the left side of the equation to get 
Then you add by two on both sides to get
Finally you divide by 2 on both sides to get
Then you add by two on both sides to get
Finally you divide by 2 on both sides to get