Question

solve the equation 3x+y-z=2 2x-y+2z=6 2x+y-2z=-2​

Answer 1

3x+y-z =2----->[1]

2x-y+2z =6----->[2]

2x+y-2z = -2--->[3]

[1]+[2]=>5x+z=9--->[4]

[2]+[3]=>4x=4

=> x=1

From [4],

z=9-5x

=9-5(1)

=9-5

=4

From[1]

y=2+z-3x

=2+4-3

=2+1

=3

Therefore x=1,y=3,z=4