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)
7*b+6*b+1 = 1 // - 1
7*b+6*b-1+1 = 0
13*b = 0 // : 13
b = 0
b = 0
| -4a+6-4a=-66 | | 3(h+8)=21 | | -5t+5-5t=-45 | | 5w+8-7w=2 | | 1+6n+3n=109 | | -31=6d+4d+9 | | -10=7k+2k-10 | | 6+4t+5t=114 | | -4x+1+6x=7 | | -n+5-4n=-30 | | -10-6w-3w=-91 | | 4x-7+7x=59 | | -2a+4+3a=12 | | -6=-5m+4m+4 | | 6k+8-4k=22 | | 25=2x-6x-7 | | -3x+3+6x=-6 | | -5=2m+6m+3 | | 3t+2+t=30 | | -31=7d+4d+2 | | 15=2w-w+9 | | -2k+6+3k=17 | | -5n+6+3n=6 | | 5(c-1)=35 | | -8+2t-t=-17 | | -7n+6+2n=-44 | | n+5+5n=-43 | | 21=-3w+6w-6 | | -3n+7-6n=88 | | -19=2a+2a+5 | | -4n+8-4n=88 | | 7+3x+7x=17 |