Question

How does 8z-z/2=z/2+15 turn into: 15z/2=15? I understand taking away z/2, but I don't understand where the 15z came from.

Answer 1

well 8 - 1/2 = 7 1/2 or 15/2

Answer 2

mulitply both sides by 2 you get 16z-z=z+30

combined terms

15z=z+30
-z -z

14z=30

probably easier

Answer 3

so it wouldnt turn into 15z/2=15 anyway :3

Answer 4

would be 14z/2=15

Answer 5

well its 15z/2 = z/2 + 15

subtract z/2 from both sides 14z/2 = 15 or 7z = 15 z = 15/7