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+b-6 = 90 // - 90
7*b+b-90-6 = 0
8*b-96 = 0 // + 96
8*b = 96 // : 8
b = 96/8
b = 12
b = 12
| 4b+3-7b=6 | | 39=3n+n+3 | | -1=-7a+2a+4 | | -5+4x+3x=-68 | | 4t-1+7t=131 | | -152=6m+7m-9 | | 4x+y=9.5 | | 6=3a+a-2 | | 14+21=11 | | 14+11= | | -2n+2-7n=2 | | 2+3m+m=-46 | | 66=6w+3w-6 | | 21=-3m+5m+9 | | 2+6w-5w=-6 | | -3d-6+7d=22 | | 8+2b+b=44 | | 3m+4-4m=8 | | 4d+1+6d=1 | | 26=6k+2k-6 | | -49=-7t+t+5 | | 8=6b-4b+4 | | -1=7w-6w-7 | | 3-2a-4a=15 | | 8+7=3 | | -6k-2-5k=-112 | | 7+b+4b=-8 | | 6w+5+4w=5 | | 1-m+4m=22 | | 5=-k+5k+5 | | -11=b+6b+3 | | -76=d+7d+4 |