Question

pls answer this question​

Answer 1

by the theorem on equal ratios

each ratio

=. X+y+z.

X+2y+z+y+2z+X+z+2x+y

=. X+y+z.

2y+2y+2z+2z+2x+2x

= X+y+z

4y+4z+4x

=. X+y+z

X+y+z

hence,

X+y+z not equals to 0