Subtract:
$-7xyfrom6xy$

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Solution

Doing subtraction
$6 x y - (- 7 x y)$
We know that the negative of a negative number is a positive number. Therefore, $- (- 7 x y) = 7 x y$
$6 x y - (- 7 x y) = 6 x y + 7 x y = (6 + 7) x y = 13 x y S o, 6 x y - (- 7 x y) = 13 x y$

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