English

Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y, –3xz + 5x – 2xy. -

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Question

Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y, –3xz + 5x – 2xy.
Sum

Solution

  7xy + 5yz - 3zx        
+     4yz + 9zx     - 4y
+ -2xy     - 3zx + 5x    
  5xy + 9yz + 3zx + 5x - 4y
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