SOLUTION: Hi! I'm in 8th grade and am struggling with Algebra 1. I am stuck on this one problem and help would be greatly appreciated as soon as possible cause i have to turn this assignment

Algebra ->  Equations -> SOLUTION: Hi! I'm in 8th grade and am struggling with Algebra 1. I am stuck on this one problem and help would be greatly appreciated as soon as possible cause i have to turn this assignment      Log On


   

Question 12168: Hi! I'm in 8th grade and am struggling with Algebra 1. I am stuck on this one problem and help would be greatly appreciated as soon as possible cause i have to turn this assignment in tommorrow and have no clue what i'm doing! Thank you so much, here is the problem: -5(4-1/2n)+1/16(-32n+8). I know that the answer is
-19 and 1/2 + 1/2n, but i can' figure out how to get it because i have it simplyfied down but i keep getting -20 and 1/2 + -4 and 1/2. Can you PLEASE HELP ME, and show how you got it!! Thank you so much!!
Found 2 solutions by rapaljer, elima:
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
-5%284-%281%2F2%29%2An%29%2B%281%2F16%29%2A%28-32n%2B8%29

Remove parentheses by distributive property:
-5%284-%281%2F2%29%2An%29%2B%281%2F16%29%2A%28-32n%2B8%29
-20+%2B+%285%2F2%29%2An+%2B+%28-32n%29%2F16+%2B+%281%2F16%29%2A8
-20+%2B+%285%2F2%29%2An+-+2n+%2B+1%2F2

Now, stop and think, 5/2 is 2 1/2, so when you take 5/2 n and take away 2n, you are left with 1/2 n. Also, when you take -20 and add 1/2, you have -19 1/2. So the answer should be -19 1/2 + 1/2 n.

R^2 at SCC

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
-5(4-1/2n)+1/16(-32n+8)
First thing to do is distribute the -5 and the 1/16;
-20+5/2n-32/16n+8/16; now you combine like terms;
-20+8/16+5/2n-32/16n
You need LCD so you can add the fractions:
-320/16+8/16+40/16n-32/16n
Now we can add:
-312/16+8/16n= 191/2+1/2n
You need to watch those signs! So many people get answers wrong only because they did not watch those signs.It looks like from your answers you must have done that also.
I hope this helps!=)