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)
(-8/63)*b = -4/9 // + -4/9
(-8/63)*b-(-4/9) = 0
(-8/63)*b+4/9 = 0
4/9-8/63*b = 0 // - 4/9
-8/63*b = -4/9 // : -8/63
b = -4/9/(-8/63)
b = 7/2
b = 7/2
| y^2+3y-7y-21=0 | | x^2+5x+2x+10=0 | | -2=v+8 | | 3/5=9/10b | | 3x^2-4x-12x+16=0 | | -7=y-2 | | 5x/4=40 | | -0.3c=27 | | 56=7/4v | | 12x-5=6x+7 | | 49x^4+238x^3y-35x^2y^2=0 | | 31=2y+13 | | 2(0)-6=0 | | 6x^2+27x+27= | | 5y+11=66 | | 3r+4r+5r=12 | | -2=k/9-15 | | v/3-16=17 | | -35x^2-43x-12= | | 9y^2-34y+25=0 | | 0.18y(y-3)+0.06=0.08y-0.3 | | u/19.2=6 | | 12y^2-27x^2=0 | | 18x^2-8y^2=0 | | 25x^2-100x+100=0 | | 4(c-6)=-12 | | y^2+4x^2y+4x^4=0 | | X/7+35=29 | | x^3y^2+2x^2y-35x=0 | | 2(u-8)-8u=8 | | x^2+49x+35=0 | | y=-3/8x-4 |