Question

can someone explain this problem and show workplease. 6(3-z) over 5 = -z

Answer 1

do you mean [6(3-z)]/5=-z
?

Answer 2

no......6(3 - z)/5=-z......this is exactly the way it is written in by book.

Answer 3

that's the same I guess, so
multiply both sides by 5:
6(3-z)=-5z
distribute on the left:
18-6z=-5z
add 6z to both sides and combine like terms:
18=6z-5z=z
therefor
z=18

Answer 4

Thanks!