SOLUTION: I have a math problem that says 1=3+n/8 and it gives you the answer of -16 and you have to show the work I have tried and -16/8=-2 so that makes the problem 1=3+-2 but 3+-2=-1 not

Algebra ->  Inequalities -> SOLUTION: I have a math problem that says 1=3+n/8 and it gives you the answer of -16 and you have to show the work I have tried and -16/8=-2 so that makes the problem 1=3+-2 but 3+-2=-1 not       Log On


   

Question 805680: I have a math problem that says 1=3+n/8 and it gives you the answer of -16 and you have to show the work I have tried and -16/8=-2 so that makes the problem 1=3+-2 but 3+-2=-1 not 1 did I mess up or was it a typo??? please help ASAP
Answer by AnlytcPhil(1807) About Me  (Show Source):
You can put this solution on YOUR website!
  1 = 3 + n%2F8

Add -3 to both sides

  1 = 3 + n%2F8
 -3  -3
--------------------
 -2 =     n%2F8

Multiply both sides by 8

-16 = n

To check, substitute (-16) for n in the original
equation:

  1 = 3 + n%2F8
  1 = 3 + %28%28-16%29%29%2F8
  1 = 3 + (-2)
  1 = 3 - 2
  1 = 1

Edwin

BTW, 1=3+(-2) is right but 3+-2=-1 is wrong!