Question

Subtract (4x − 3y) from the sum of (12x + 9y) and (−2y).

Answer 1

sum of 12x +9y+(-2y)
=12x +9y-2y
=12x+7y

subtract 4x -3y from 12x + 7y
=12x + 7y-(4x - 3y)
=12x + 7y-4x +3y
=12x - 4x + 7y + 3y
=8x + 10y

Hey....
Here is ur answer.....

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Answer 2

$sum = \: 12x + 9y + (- 2y) \\ = 12x + 9y - 2y \\ = 12x + 7y \\ \\ subtract = (12x + 7y) - (4x - 3y) \\ =( 12x - 4x) + (7y - 3y) \\ = 16x + 4y$