If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( b )
3*b-1 = 0
2*b+1 = 0
3*b-1 = 0
3*b-1 = 0
3*b-1 = 0 // + 1
3*b = 1 // : 3
b = 1/3
2*b+1 = 0
2*b+1 = 0
2*b+1 = 0 // - 1
2*b = -1 // : 2
b = -1/2
b in (-oo:-1/2) U (-1/2:1/3) U (1/3:+oo)
(4*b+5)/(2*b+1) = (6*b+1)/(3*b-1) // - (6*b+1)/(3*b-1)
(4*b+5)/(2*b+1)-((6*b+1)/(3*b-1)) = 0
(4*b+5)/(2*b+1)+(-1*(6*b+1))/(3*b-1) = 0
((4*b+5)*(3*b-1))/((2*b+1)*(3*b-1))+(-1*(6*b+1)*(2*b+1))/((2*b+1)*(3*b-1)) = 0
(4*b+5)*(3*b-1)-1*(6*b+1)*(2*b+1) = 0
3*b-6 = 0
(3*b-6)/((2*b+1)*(3*b-1)) = 0
(3*b-6)/((2*b+1)*(3*b-1)) = 0 // * (2*b+1)*(3*b-1)
3*b-6 = 0
3*b-6 = 0 // + 6
3*b = 6 // : 3
b = 6/3
b = 2
b = 2
| 10x+20=12x+28 | | x+9-9/4 | | -3.5t=2.31 | | f(x)=x^2+2x+3 | | -37=3(6.5)+11-7(6.5) | | 15x=630 | | 22(3x-2)-3x=5 | | 16d+6d+8=-14 | | 2-x=5/7x-94/7 | | X/3-5=4 | | -3t=2.31 | | 11x+3=25 | | 11+7/9n=4 | | 11-15/3=6 | | 3x+12=x+5 | | 10=-x/6 | | 8(x-5)+20=-68 | | y=--3+1 | | 8-10x=168 | | z=(-1) | | 4(-9-7x)=300 | | x-15/3=6 | | 4/3=12 | | 0.04m-1.6=0.8 | | 8.6=d+4-2.4 | | 11a/7=121 | | 5x+12y=99 | | 4b+5/2b+1=6b+1/3b-1 | | x=5+-4y | | 15a^2+63a+12=0 | | 4x=320 | | c-32=27 |