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If A=({:(2,3,10),(4,-6,5),(6,9,-20):}) f...

If `A=({:(2,3,10),(4,-6,5),(6,9,-20):})` find `A^(-1)`. Using `A^(-1)` solve the system of equations.
`(2)/(x)+(3)/(y)+(10)/(z)=2,(4)/(x)-(6)/(y)+(5)/(z)=5,(6)/(x)+(9)/(y)+(20)/(z)=-4`

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