6x – 5y + 3z = 23
4x + 8y – 11z = 7
5x – 6y + 2z = 11
Given the equations above, x + y + z = ?
Choose one.
A) 11  B) 12  C) 13  D) 14  E) 15
(6x – 5y + 3z) - (5x – 6y + 2z ) = 23-11   or, x+y+z = 12   Option 12 is the ans
<result>B</result>
6x – 5y + 3z = 23
4x + 8y – 11z = 7
5x – 6y + 2z = 11
Given the equations above, x + y + z = ?