2006-12-18 08:58:29 · 9 answers · asked by Dj Smith 1 in Science & Mathematics ➔ Physics
5n + 4 - 8n = -5
Start by combining like terms (numbers with numbers) & (variables/numbers together)
Thus:
5n + 4 - 8n = -5
5n + (-8n) = -3n
-3n + 4 = -5 (move the 4 to the other side substracting)
-3n = -5 - 4
-3n = -9 (divide both sides by negative 3)
n = 3 (notice the - is gone since -9/-3 negative signs cancel out)
2006-12-18 09:15:20 · answer #1 · answered by Me 1 · 0⤊ 0⤋
Start by combining like terms. 5n + 4 - 8n = -5 ==> -3n = -9, which you get by adding 5n and -8n (because 5 - 8 = -3) and then subtracting 4 from both sides. This looks a bit better when you rewrite it as 3n = 9. Then just divide both sides by 3 to get n = 3.
2006-12-18 17:00:51 · answer #2 · answered by DavidK93 7 · 0⤊ 0⤋
5n-8n= -3n
-3n + 4 = -5
then add -4 o 4 to cancel it out and then -4 to -5 which equals -9
-3n= -9
divide -9 by -3
n = 3
2006-12-18 18:02:59 · answer #3 · answered by sweet&&simplistic 1 · 0⤊ 0⤋
5n+4-8n=-5
-4 -4
___________
5n-8n=-9
subtract 5n and 8n
-3n=-9
divide by -3
and get n=3
2006-12-18 17:16:22 · answer #4 · answered by Molly 2 · 0⤊ 0⤋
5n-8n=-3n+4
3n+4=-5
-3n=-9
n=3
2006-12-18 17:01:45 · answer #5 · answered by Help in 1 · 0⤊ 0⤋
-3n + 4 = -5
4 + 5 = 3n
9 = 3n
9/3 = 3n/3
3 = n
2006-12-18 17:06:24 · answer #6 · answered by Shannon L - Gavin's Mommy 6 · 0⤊ 0⤋
The answer is n = -1/3
2006-12-18 17:11:21 · answer #7 · answered by Anonymous · 0⤊ 0⤋
combine like terms
so -3n+4=-5
then -3n=-9 and n=3
this is like pre algebra comon
2006-12-18 17:06:10 · answer #8 · answered by HS Sweetness 3 · 0⤊ 0⤋
_3n=_9 than n=3
2006-12-18 17:02:24 · answer #9 · answered by curious 3 · 0⤊ 0⤋