Question: Obtain an equivalent system by performing the stated elementary operation on the system. Replace the second equation by the sum of itself and 2 times

Obtain an equivalent system by performing the stated elementary operation on the system. Replace the second equation by the sum of itself and 2 times the third equation.

-7x - 4y + 10z = -14

2x + 2y - 15z = 8

8x + 14y + 3z = 16

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