Question

x+y+z=6 2x+3y-z=5 6x-2y-3z=-7​

Answer 1

x+y+z=6.........eq(i)

2x+3y-z=5..........eq(ii)

6x-2y-3z=-7.........eq(iii)

adding eq i and ii..... We get

3x+4y=11.......eq(iv)

multiply eq i by 3.....

3x+3y+3z=18........eq(v)

adding eq v and iii......we get

9x+y=11......eq(vi) ×4

36x+4y=44........eq(vii)

subtracting eq iv from vii......we get

x=1, y=2

putting the value of x and y in eq i..... we get

z = 3......

sorry for making so much equations......but trust me i is very helpful to understand