add 7xy+5yz-3zxand4yz+9zx-4y
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Step-by-step explanation:
7x + 5yz - 3zx + (4yz + 9zx - 4y) + (- 3xz + 5x - 2xy)
7xy + 5yz - 3zx + 4yz + 9zx - 4y - 3xz + 5x - 2xy
By rearranging :-
7xy - 2xy + 5yz + 4yz - 3zx + 9zx - 3xz - 4y + 5x
5xy + 9yz + 3zx - 4y + 5x
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