SOLUTION: solve for x, [-5 0 -1] [2 1 0] = 4 [x 3 0]

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Question 393585: solve for x,
[-5 0 -1]
[2 1 0] = 4
[x 3 0]
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
det%28matrix%283%2C3%2C-5%2C0%2C-1%2C2%2C1%2C0%2Cx%2C3%2C0%29%29+=+4 <==> 0 + 0 - 6 - (-x + 0 + 0) = 4.
==> -6 + x = 4 ==> x = 10.