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)
(3/2)*x+20 = 0
3/2*x+20 = 0 // - 20
3/2*x = -20 // : 3/2
x = -20/3/2
x = -40/3
x = -40/3
| 48+4y-15=13y-9-2y | | -(12j-v)= | | x^3-4x^2-21x-216=0 | | 100=3x*5 | | r-3=(-7) | | 5x+(-8)=(-2x)+(-6) | | 51/4/32/3 | | -4x-4(17+2x)=16 | | 5b^3+34b^2-7b=0 | | 8+r=(-7) | | x+3(-6)=-16 | | x/16-5/8=(x+6)/8 | | 7/10x=84 | | 10(-16-3y)+6y=-16 | | 7+r=(-3) | | y=1/3*0.3333-2 | | 6w^4*x^2-8u^2*x/4x^3 | | (-2)+r=8 | | 2(p-1)=3p+2 | | y=1/3(-2)-2 | | y=1/3(2)-2 | | z^2-4z-8=0 | | 4x-4=2x-34 | | y=-2(-3)-8 | | -10x^2+9x+9= | | 7/12x=35 | | 3x+7=-2-8 | | 2r-6=8 | | 4x^2-25x+25= | | (x-9)2=49 | | -3(5x+12)=-18x-15 | | -1924*x=-962 |