SOLUTION: how do you solve a problem that is 21 -Z divided by 3 = 5? please also give the answer, thanks.

Algebra ->  Equations -> SOLUTION: how do you solve a problem that is 21 -Z divided by 3 = 5? please also give the answer, thanks.       Log On


   

Question 614269: how do you solve a problem that is 21 -Z divided by 3 = 5? please also give the answer, thanks.

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
how do you solve a problem that is 21 -Z divided by 3 = 5
assume the problem is
%28%2821-z%29%29%2F3 = 5
Multiply both sides by 3, gets rid of the denominator
21 - z = 3(5)
21 - z = 15
Subtract 21 from both sides
-z = 15 - 21
-z = -6
z = +6
:
:
Check in the original problem
%28%2821-6%29%29%2F3 = 5