Question

Solve for n: 6(n – 2) + 2n = 7n + 3(n – 2)
I get positive 3.
But the answers are -3,-9, all real solutions, no solution. what am i doing wrong?

Answer 1

6(n – 2) + 2n = 7n + 3(n – 2)
6n-12+2n=7n+3n-6
8n-12=10n-6
8n-10n=-6+12
-2n=6 multiply both sides by (-1)
you will get..
2n=-6
so
n=-3 :)