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-4 = 1/81 // - 1/81
b-(1/81)-4 = 0
b-1/81-4 = 0
b-325/81 = 0 // + 325/81
b = 325/81
b = 325/81
| -5-5x=-5(1-8x) | | -9=a+3 | | P(-3)=x^4-2x^3-4x+4 | | 2(x^3-4x^2+2)=0 | | 8x+15=119 | | 3p*(-4)=60 | | 2x+5=99 | | n+4-(-3n)-7= | | 20-x=.099*(75-x) | | 2x-11=4x+20 | | -.08x+.10y=.10 | | 0.25*z=4 | | 12-2/3m+4-3/4m= | | v=9x^2*4 | | 1.3=ln(x)+ln(x+4) | | X-1+2+3+X+6=180 | | 40-p=8 | | 12x=34x+2 | | 2x+y=1024 | | 4(x+2)+3x+7= | | 8/50,1/43 | | 2x^3-8x^2+4=0 | | 2x+0.4=0 | | 12/28,27/63 | | -3i= | | x-44=4(2x+3)-7 | | -4+8i= | | 5/8,20/32 | | 1.7+3.8=7.71 | | -6/35x=-18/25 | | 31+6p=7(1+2p) | | 6(x^5)(y^7)(w^3)/8(x^2)(y^10)(w^3) |