If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the first and third equations, then the second and third equations.
x – y + 2z = –2
2x + 2y + z = 7
3x + 3y – z = 3

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add 2nd and 3rd equation, what u get ?

thanks That helped a lot.

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