Question

the sum of 3x-2y+4z and 7y-2z is

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Answer 1

Answer:

the answer of 3x-2x+4z + 7y-2z is 3x+5y+2z

Answer 2

Answer:

$(3x - 2y + 4z) + (7y - 2z) \\ = 3x - 2y + 4z + 7y - 2z \\ = 3x + 5y + 2z$

It's your answer..... I hope you understand..