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)
b-9 = -13 // + 13
b-9+13 = 0
b+4 = 0 // - 4
b = -4
b = -4
| 5x+4x-9+1=-x-2x+9+7 | | 5/9(-6x+4)=-8 | | k-8=-14 | | 2+k=-10 | | -4+x=-3 | | t-7=0 | | 5=m-5 | | 7t=-70 | | 5(x+9)-3(x-7)=11(x+2)-10 | | 5(x+9)-3(x-7)=11(x+2)-1 | | 4=n+4 | | 7+m=7 | | a/3=-1 | | d/-2=-6 | | m/-7=-1 | | 8+k=10 | | 3x+18=2(x+18) | | 2(x+2)+4x=11-x | | 2x+3(x-1)=6(x-3)+13 | | 10+t=-2 | | 17=m+6 | | 5n+2=2n+5 | | 2k=2 | | 15=k+6 | | 23x+15=15 | | 7b=-84 | | w-1=5 | | -8=a-5 | | 23x+15=15 | | 2(5x-4)=3(3x+5) | | -1=d+3 | | -2n=6 |