7xy+5yz-3zx:4yz+9zx-4yand-3xz+5x-2xy
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Answer:7xy + 5yz - 3zx + 4yz + 9zx - 4y - 3xz + 5x - 2xy
》7xy - 2xy + 5yz + 4yz + 9zx - 3zx - 3zx - 4y + 5x
》 5xy + 9yz + 3zx - 4y + 5x ( answer)
Explanation:
Similar terms need to be assembled and then assessed carefully according to their signs and the unlike terms are written separately.
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