If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x+1 = 0
x+3 = 0
x+1 = 0
x+1 = 0
x+1 = 0 // - 1
x = -1
x+3 = 0
x+3 = 0
x+3 = 0 // - 3
x = -3
x in (-oo:-3) U (-3:-1) U (-1:+oo)
(4*x)/(x+3)-(6/(x+1)) = 4 // - 4
(4*x)/(x+3)-(6/(x+1))-4 = 0
(4*x)/(x+3)-6*(x+1)^-1-4 = 0
(4*x)/(x+3)-6/(x+1)-4 = 0
(4*x*(x+1))/((x+3)*(x+1))+(-6*(x+3))/((x+3)*(x+1))+(-4*(x+3)*(x+1))/((x+3)*(x+1)) = 0
4*x*(x+1)-6*(x+3)-4*(x+3)*(x+1) = 0
4*x^2-4*x^2-2*x-16*x-18-12 = 0
-18*x-30 = 0
(-18*x-30)/((x+3)*(x+1)) = 0
(-18*x-30)/((x+3)*(x+1)) = 0 // * (x+3)*(x+1)
-18*x-30 = 0
-18*x-30 = 0 // + 30
-18*x = 30 // : -18
x = 30/(-18)
x = -5/3
x = -5/3
| (5x-8)/2+(4x+1)/3=4 | | -6/(x-8)-8/(x-3)=9 | | 15x-24+8x+2=24 | | 9-2(4g-2)= | | 15a+10b-10a-3b+5a= | | 0.04x-0.7(-6.272727273-3)=6.24 | | 25/5-3*2 | | 4x+44=6x-8 | | 12=4(x-2)-(x-3)(2x-5) | | 8y-3=17-2u | | 164-4x=6x+18 | | 0.04x-0.7(x-3)=6.24 | | 4x-1=13x-34 | | 2x+34=11x-38 | | 8d+7=4d+19 | | 0.3x-0.05(8.64+2)=2.06 | | 6/(x-5)=-6/(x+7) | | 2x+34=11x+2 | | 89-3x=2x+16 | | 5x-80=2x-107 | | (x+5)*(5x-4)=(x-4)*(1-3x) | | (x-6)*(4x+3)=(x-12)*(3x+4) | | 8c+10=8c+10 | | 6ab+2cd-5ef= | | 1x+4x=34+x | | 0.3x-0.05(x+2)=2.06 | | 9*64*20= | | (x+1)*(x-1)=(x-3)*(x+5) | | 0.2(7.2-6)+0.05x=0.6 | | 0.2(7.2-6)+0.05x=x | | 5x+27=42 | | 9a-13b-8a+14b= |