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Solve the system of equations2/x+3/y+(10...

Solve the system of equations`2/x+3/y+(10)/z=4`,`4/x-6/y+5/z=1`,`6/x+9/y-(20)/z=2`

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Let `1/x=p` , `1/y=q` `1/z=r`
`2p+3q+10r=4`
`4p-6q+5r=1`
`6p+9q-20r=2`
...
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