add 7 y - 5 x + z and 2x+y
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7y - 5x + z and 2x + y
⇒ 7y - 5x + z + 2x + y
We have to group the like terms together and then add the terms.
⇒ (7y + y) + (2x - 5x) + z
⇒ 8y + (-3x) + z
⇒ 8y - 3x + z
∴ Hence, the sum of 7y - 5x + z and 2x + y is 8y - 3x + z.
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