Solve the following determinant equation for x belongs to r
| 15 x -4 |
| x+7 -2 |
these lines before and after numbers are of matrix signs
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Answer:
(15x ×-2)- (-4×(x+7)
(15x-2 ) - (-4x-28)
(-30x) - ( 112x )
-30x-112x
-142x
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