Posted by Erica on Wednesday, August 31, 2011 at 1:06am.
5(2n + 4)  3(4n  6) = 2(20  n)
I solved this equation and this is what I got.
10n + 20  12n + 18 = 40  2n
2n + 38 = 40 2n
38 ≠ 40
What does this mean?
Thank you!

Algebra  Dark, Wednesday, August 31, 2011 at 2:17am
This equation is invalid, the left and right sides are not equal, therefore there is no solution.

Algebra  Reiny, Wednesday, August 31, 2011 at 7:53am
If you end up with no variables, and the remaining statement is false, like in your case > the equation has no solution.
If you end up with no variables, and the remaining statement is true > the equation is true for any value of the variable. It would be an "identity"
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