Mathematics, 19.07.2020 01:01, kprincess16r

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. A. 6x + 10y + 112 = -18
B. 4x - 4y - 5z = -20
C. 5x- 6y+11z=10

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Obtain an equivalent system by performing the stated elementary operation on the system. Replace the...