8x, +4x2-x = 11 -2x, + 5x, + X3 = 4 2x, - x2 + 6x3 = 7 %3D

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Q: –+l 15=405 %3D

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A: Please see the answer below.

Q: 7 is not a fact

A: answer is in next step

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A: sum of angle is 90 3x -46 +14 = 90 3x - 32 = 90 3x = 122 x = 122/3 x = 40.66

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A: Topic = Determinant

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A: I am attaching image so that you understand each and every step.

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