Obtain an Equivalent System by Performing the Stated Elementary Operation $x-5 y+z=5$

Multiple Choice

Obtain an equivalent system by performing the stated elementary operation on the system.
-Multiply the second equation by -1 .
$x-5 y+z=5$
$3 x-3 y-z=-18$
$5 x+y+4 z=-12$
$x-3 y+z=-7$

A) x - 5y + z = 5
-3x + 3y + z = 18
5x + y + 4z = -12
X - 3y + z = -7
B) x - 5y + z = 5
-3x - 3y - z = -18
5x + y + 4z = -12
X - 3y + z = -7
C) x - 5y + z = 5
-3x + 3y + z = -18
5x + y + 4z = -12
X - 3y + z = -7
D) -x + 5y - z = -5
3x - 3y - z = -18
5x + y + 4z = -12
X - 3y + z = -7