If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
6*b+1 = 2*b+13 // - 2*b+13
6*b-(2*b)-13+1 = 0
6*b-2*b-13+1 = 0
4*b-12 = 0 // + 12
4*b = 12 // : 4
b = 12/4
b = 3
b = 3
| -10+4x=5x-12 | | 3+5d=6d-7 | | x-2.5=4 | | x-1.5=4 | | 6a-10=-6a+26 | | d+3=-5d-51 | | 9+3n=5n+5 | | -7m+1=2m-26 | | 4x+8=-22-x | | -6k+2=-7-7k | | x+15=-17 | | 7d-8=-6d+18 | | 7n+2=-53-4n | | 7m-4=2m-24 | | -9-2w=6w+15 | | 4-7t=-5t+24 | | 2k+6=7k+31 | | -3x-2=4x+33 | | 2w-6=-6-w | | 5w+4=0+7w | | x+4=5x-32 | | 2d+7=-6d+103 | | 6x+1=-5x+45 | | 8+3w=-5w-40 | | 2w+8=7+3w | | 9+w=6w-51 | | -3+5k=7k-1 | | 6b+8=-7b+8 | | 6d-10=30-2d | | -4k+3=43+6k | | 5d-1=32-6d | | -3b+5=-50+2b |