If we add, 7xy + 5yz – 3zx, 4yz + 9zx – 4y and –3xz + 5x – 2xy, then the answer is:
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Answer:
The answer is 5xy+9yz+3zx+5x-4y.
Step-by-step explanation:
(7xy+5yz-3zx) + (4yz+9zx-4y) + (-3xz+5x-2xy)
= 7xy+5yz-3xz+4yz+9zx-4y-3zx+5x-2xy
= 7xy-2xy+5yz+4yz-3zx+9zx-3zx-4y+5x
= 5xy+9yz+3zx-4y+5x
or
5xy+9yz+3zx+5y-4y
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