6x – 5y + 3z = 23
4x + 8y – 11z = 7
5x – 6y + 2z = 10
Given the equations above, x + y + z = ? Choose the correct choice from the following:
A) 11
B) 12
C) 13
D) 14
E) 15
(6x – 5y + 3z) - (5x – 6y + 2z ) = 23-10   or, x+y+z = 13   Option 13 is the ans
<result>C</result>
6x – 5y + 3z = 23
4x + 8y – 11z = 7
5x – 6y + 2z = 10
Given the equations above, x + y + z = ?