SOLUTION: the problem: 7n + (-1) __________ = 8 8 This is a problem in my daughter's math book... I don't know how to do algebra. Can you explain how to do thi

Algebra ->  Equations -> SOLUTION: the problem: 7n + (-1) __________ = 8 8 This is a problem in my daughter's math book... I don't know how to do algebra. Can you explain how to do thi      Log On


   



Question 19670: the problem:
7n + (-1)
__________ = 8
8
This is a problem in my daughter's math book... I don't know how to do algebra. Can you explain how to do this and what the answer is? Thank you.

Answer by xcentaur(357) About Me  (Show Source):
You can put this solution on YOUR website!
%287n+%2B+%28-1%29%29%2F8+=+8
Take the 8 from the denominator over to the right hand side
on the left it was division,when you take it over to the right it becomes multiplication
so we get,
+7n-1=8%2A8
on multiplying we get,
7n-1=64
now take the -1 over to the other side
when you take it to the other side,plus becomes minus,minus becomes plus
so we get,
7n=64%2B1
add it up,
7n=65
n=65/7


Thats your answer

remember that when you take something to the other side of an '=' sign,say from the left to the right,whatever it was turns oppposite.meaning something that was addition becomes subtraction on the other side,division becomes multiplication,and so on.


Hope this helps,
xC