If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(-1/5)*x-6 > -3 // + 3
(-1/5)*x-6+3 > 0
-1/5*x-3 > 0 // + 3
-1/5*x > 3 // : -1/5
x < 3/(-1/5)
x < -15
x in (-oo:-15)
(-oo:-15)
| 18=2z-8+8 | | 5x-6-5(x+1)=-2x-6 | | 7x-(9x+5)=5x-19 | | 2x-5=3x+15 | | 5x-6-5(x+1)=-2x+6 | | 3sin^3x+4cos^3x=y | | 6y-x=18 | | (2x+4)-x=2 | | 45000-5x=0 | | 3x-15+16=2x+6 | | x-2y+3z=1 | | -3x+5y-z=2 | | 5/8u=4 | | 222x^2-x+2=0 | | 7x-(2x-15)=45 | | -56=-8u | | 2g^2+7g+3=0 | | 8/5v=12/5 | | 190=2Q+3Q^2 | | y^16/y^7 | | 3/5=-1/3t | | 27=v(v+-6) | | 3(10x)+5y=172 | | 14-12=5w-7w | | e^-1/16x | | -8+4=3v-5v | | 2x^2-16=8x | | 25x-4x^2=0 | | (2x+3)+(2x-1)+(4x+2)=180 | | 2x=-1.5 | | -1=y/10 | | 81v^2-16v=0 |