SOLUTION: ((-6.9+7.7)/-2 )+1 OK this one I am totally LOST. I do not no what any of this means what is the (( and the /-2 mean?? I cant even find this in my textbook. Can someone please e

Algebra ->  Equations -> SOLUTION: ((-6.9+7.7)/-2 )+1 OK this one I am totally LOST. I do not no what any of this means what is the (( and the /-2 mean?? I cant even find this in my textbook. Can someone please e      Log On


   

Question 114932: ((-6.9+7.7)/-2 )+1
OK this one I am totally LOST. I do not no what any of this means what is the (( and the /-2 mean?? I cant even find this in my textbook. Can someone please explain to me how this problem is actually work out? Thank you much.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%28%28-6.9%2B7.7%29%2F-2+%29%2B1 Start with the given equation


0.8%2F-2+%2B1 Add -6.9 to 7.7 to get 0.8


%288%2F10%29%2F-2+%2B1 Rewrite 0.8 as 8%2F10


%284%2F5%29%2F-2+%2B1 Reduce


%284%2F5%29%2A%28-1%2F2%29+%2B1 Multiply by the reciprocal


-4%2F10+%2B1 Multiply


-2%2F5+%2B1 Reduce



-2%2F5+%2B5%2F5 Rewrite 1 as 5%2F5


%28-2%2B5%29%2F5 Combine the fractions


3%2F5 Add the numerators

So the answer is 3%2F5 or 0.6 in decimal form


So %28%28-6.9%2B7.7%29%2F-2+%29%2B1=3%2F5 or %28%28-6.9%2B7.7%29%2F-2+%29%2B1=0.6