Take any number. Multiply it by $10$ . Add $7$ to the result. Subtract $z$ from the result. What is the final result?

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Solution

Let the number be $x$ .
The number multiplied by $10 = 10 x$
The resultant is added to $6 = 10 x + 6$
$z$ is subtracted from the result $= 10 x + 6 - z$
Hence, the resultant $= 10 x + 6 - z$ .

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