Find the value of the following expression when $x = 2, y = - 3, z = 1$
$2 x - 3 y$

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Solution

The expression is $2 x - 3 y$
Putting the values, $2 x - 3 y = (2 \times 2 - 3 \times (- 3)) = (4 + 9) = 13$
Hence the value of expression $2 x - 3 y$ when $x = 2, y = - 3, z = 1$ is $13$ .

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