Add : -4x – 5y +7, 5x + y + 3 and 3x - 3y – 2

12x -9y + 8

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-12x + 9y – 8

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4x -7y + 8

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-4x +7y -8

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Solution

The correct option is C
4x -7y + 8

-4x – 5y +7 + 5x + y + 3 + 3x - 3y – 2

= (-4x + 5x + 3x) + ( -5y +y -3y) + ( 7 + 3 -2)

= 4x – 7y + 8

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