ADD: 2x + 4y - 3z 3y + 2z + 6x 4z - 8x - 7y
1 answer:
(2x + 4y - 3z) + (3y + 2z + 6x) + (4z - 8x - 7y)
= 2x + 4y - 3z + 3y + 2z + 6x + 4z - 8x - 7y
= (2x + 6x - 8x) + (4y + 3y - 7y) + (-3z + 2z + 4z)
= 0 + 0 + 3z
= 3z
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