If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
3*n-1 = n+13 // - n+13
3*n-n-13-1 = 0
2*n-14 = 0 // + 14
2*n = 14 // : 2
n = 14/2
n = 7
n = 7
| -5a+7=103+7a | | 6+7n=5n+16 | | -4+2t=-6t+76 | | 7-2b=4b+37 | | 3+4t=7t-3 | | 6-2n=n-27 | | -5n-10=-5-4n | | 2+2d=3d+10 | | 5x+3=67-3x | | -6+2n=-5n-41 | | 7b+7=85-6b | | 3d+5=2d+3 | | 4w+1=-6w+81 | | 5-2b=b+23 | | 7d+7=11+6d | | 2w+1=-8+w | | -2+6b=-2b+86 | | 10-5k=6k-12 | | -10+7t=-7t+4 | | 5-2k=3k+15 | | -5n+5=-49+4n | | 3m+3=-8+4m | | 4-7x=7x+74 | | -5t+9=6t-123 | | 6+2n=-4n-60 | | 7m+6=-82-4m | | 5a-6=-28+7a | | -8-4d=6d+72 | | 6n-5=n+35 | | -3w+7=3w-47 | | 3n+4=39-2n | | 5t-2=-2+4t |