Question

(4x-3y+7z)-(-2x-3y+7z)

Answer 1

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$(4x - 3y + 7z) - ( - 2x - 3y + 7z) \\ = (4x - 3y + 7z) + 2x + 3y - 7z \\ = 4x - 3y + 7z + 2x + 3y - 7z \\ = 6x$

Answer 2

Step-by-step explanation:

Question: (4x-3y+7z)-(-2x-3y+7z)

Answer:Refer to the attachment

Note: In subtraction, the signs of the second expression will be changed. For eg, (-) to (+) and (+) to (-).