Question

x-2y+z=5 ① x-y=2 ② 2x+3y+z=1③

Answer 1

x-2y+z=5 ① x-y=2 ② 2x+3y+z=1③

x=y+2;

2-y+z=5 ①

2y+4+3y+z=1③;

z-y+2= 5①;

z-y=3①

5y+z+3=0③;

z=y+3

③ - ①

6y+3=-3

y=-1

x=1

z=2