6z+2y=16 z + 5y = 26

6z+2y=16

6z+2y-2y=16-2y

6z=16-2y

6z/6=16-2y/6

z = (8-y)/3

z + 5y = 26 sub in Z and solve for y

8-y/3+5y=26

8-y/3+15y/3=26

8-y+15y/3=26

8+ 14y/3=26

14y/3+8-8=26-8

14y/3=18

14y/3*3=18*3

14y=54

14y/14=54/14

y=27/7

z = (8-y)/3

z=(8-27/7)/3

z=56/7-27/7)/3

z=(29/7)/3

z=4.14/3

=1.38