Question

21= 1 /6 z + 20 can someone help explain this to me?

Answer 1

Explanation:

21=1/6z+20

21-20=1/6z

1=1/6z

multiply both sides by 6/1 to eliminate '1/6' in z

1×6/1=1/6z×6/1

6=z

z=6

Check:

when z=6

21=1/6×6+20

21=1+20

21=21