dont no how to do this problem 2n-5=8n+7??? i really need help in maTH AS U CAN TELL ITS NOT MY BEST SUBJECT?

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dont no how to do this problem 2n-5=8n+7??? i really need help in maTH AS U CAN TELL ITS NOT MY BEST SUBJECT?

Thanks again

2007-09-30 15:00:26 · 3 answers · asked by Damaris 1 in Science & Mathematics ➔ Mathematics

3 answers

Spelling would be the other one, I suppose.
Simple equation in 1 unknown:
2n - 5 = 8n + 7
Gather like terms on opposite sides:
7 - 5 = 8n - 2n
2 = 6n
n = 2/6 or 1/3

2007-09-30 15:05:39 · answer #1 · answered by Robert S 7 · 0⤊ 0⤋

2n-5=8n+7 first subtract like characters

-5-7=8n-2n simplify

6n= -12 now solve

n=?

hint: divide one side by "a piece" of the other
the answer above failed to take into account the negative sign on the 5 so be careful

2007-09-30 15:06:52 · answer #2 · answered by Jabob the aardvark 2 · 0⤊ 0⤋

2n-5=8n+7
2n-8n=7+5
-6n=12
n=12/(-6)
n=-2

2007-10-01 09:32:27 · answer #3 · answered by Amy B 2 · 0⤊ 0⤋