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-((2/3)*x) = 12 // - 12
20-((2/3)*x)-12 = 0
(-2/3)*x-12+20 = 0
8-2/3*x = 0 // - 8
-2/3*x = -8 // : -2/3
x = -8/(-2/3)
x = 12
x = 12
| 3f+6=36 | | 2/3(x)-20=12 | | 5x-2=5(x+6) | | 4n+3m=46+11 | | 5+(8x*y)2z=5+8x(y*2z) | | 7x+3=12+2x-3 | | 3n+4m=46+11 | | 1/2x-7=11-1/2 | | xp+up=z | | 5x^2+14x-10=0 | | 17-(6x+3)=-3 | | T-c=p | | R-c= | | 16d-(5+11)=19 | | E=mcsquared | | 20-2/3=11 | | 25x+36y=10 | | 16d-(5b+11)=19 | | 15-x/3=11 | | 40x+50y=3 | | 5(b-4)-6b=-24 | | 5(b-4)-6b=-23 | | 10-2(8+3p)=14 | | 7y+14-5=-30 | | 6a+5=7a | | 0,3.(x-5)+0,4.(6x+3)=0,8 | | 3x^3+x^2-x^4-2x^2-4=0 | | 1.44224957x^2+1.709975947x-12=0 | | 3x+36+5x=180 | | 50+a=144 | | 100+a=460 | | 4.(2x+13)+6.(3x-1)=5.(2X-3)+9 |