HELP PLS! Perform an operation on the given system that eliminates the indicated variable. Write the new equivalent system.

2x + y − 4z = 4
2x + 4y + z = 15
6x − 3y − z = 11
Eliminate the x-term from the third equation.

2x + y − 4z = 4
2x + 4y + z = 15
= −34

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