Solve the following system of equations. 2x+3y-z=2 x+2y+z=7 3x-y-2z=1 Find the v

Question

Solve the following system of equations.    2x+3y-z=2 x+2y+z=7 3x-y-2z=1                          Find the value of Y. A. -1 B. 0 C. 1 D. 2 Thanks for any help you can provide for me!!! Solve the following system of equations.    2x+3y-z=2 x+2y+z=7 3x-y-2z=1                          Find the value of Y. A. -1 B. 0 C. 1 D. 2 Thanks for any help you can provide for me!!!

Explanation / Answer

2x+3y-z=2       eq1 x+2y+z=7        eq2 3x-y-2z=1        eq3 eq1+eq2=> 3x+5y=9   eq5 eq2*2 => 2x+4y+2z=14 eq6 eq6+eq3=> 5x+3y=15 now equations have been rewritten into 5x+3y=15    eq 7 3x+5y=9      eq 8 eq7*3 => 15x+9y=45 eq8*5 => 15x+25y=45 subtract => 16y=0 y=0

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