Solve for both systems 3y+5z=85 and 6y+2z=34

6y+2z=34

6y-6y+2z=34-6y

2z=34-6y

2z/2=34-6y/2

z=17-3y

3y+5z=85

3y+5(17-3y)=85

3y+5(17) (5)(-3y)=85

3y+85-15y=85

85-12y=85

85-12y-85=85-85

-12y=0

-12y/-12=0/-12

y=0

z=17-3y

z=17-3(0)

z=17