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)
-20 = x/(-4) // - x/(-4)
-(x/(-4))-20 = 0
1/4*x-20 = 0 // + 20
1/4*x = 20 // : 1/4
x = 20/1/4
x = 80
x = 80
| x^2+9y^2-8x+7=0 | | 5*(2X+4)=303 | | (R+n)-7= | | 10+y=0 | | y=17.6+1.2(1+1r) | | 5+(3-n)= | | 5x+1=81x | | y=17.6+1.2r(1+1t) | | (T-3)-7= | | 99/33×3= | | 12x+43=90 | | x+13=-27 | | 4X-4-3=0 | | 1+x=2x+b | | X/29=5 | | 27h-3h=35 | | -22x=418 | | 2b(b-8)=30 | | 8m+0.85=760 | | 15+6(-3-11)= | | 2/3t=5/2 | | y=1+0.75y+1+0.3r+3.5+(-1.0-0.1) | | 1x+y+13=180 | | -4x+6=-4x+3 | | 1=y-siny | | 68-2x=12 | | 2(X+A)=12 | | 18x-34=2 | | 6x-18=2(3x-9) | | 6x/x*3x=y | | 1x+40+y=180 | | -2x+12=2x-16 |