Subtract $5 p - 3 q - 2 r f r o m 7 p + 2 q - 5 r$ .

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Solution

Given that: Subtract $5 p - 3 q - 2 r f r o m 7 p + 2 q - 5 r$ .
$= 7 p + 2 q - 5 r - (5 p - 3 q - 2 r)$
$= 7 p + 2 q - 5 r - 5 p + 3 q + 2 r$
$= (7 p - 5 p) + (2 q + 3 q) + (- 5 r + 2 r)$
$= 2 p + 5 q - 3 r$
Therefore, subtract $5 p - 3 q - 2 r f r o m 7 p + 2 q - 5 r$ we get $2 p + 5 q - 3 r$

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