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?
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"