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)
(36/6)*x = (21/3)*x // - (21/3)*x
(36/6)*x-((21/3)*x) = 0
(36/6)*x-7*x = 0
-1*x = 0 // : -1
x = 0
x = 0
| 0=-4x^3+24x^2-36x | | 91=4x^2 | | 5x^2-125x=0 | | 80/4000=x/6000 | | 3y^2=120 | | 1021/2-1013/4 | | 8x-9y=63 | | 8/8-4/8 | | w^2=48 | | 7.06=2(3.14)(R) | | 732/14=x/42 | | 14x^2-59x+190=0 | | 18y-6=0 | | 3y/10-4=y/5+5 | | 14/732=x/42 | | 12(4x-4)=4(12x+2) | | 4(x+2)=7(x-1)-9 | | 91=4x(x) | | 5(x+51/2)-2x | | 47+y+47=180 | | N^2+20n=-51 | | 8(5x-5)=20 | | 2(w+12)+2w=104 | | X+1.5X=15 | | 20x(x)=31(31) | | 4+9p-3=9p+22-3p | | 6*4/7 | | 178/8-4/8 | | 16(-T^2+2T+3)=0 | | 3(3/7)/(4/7) | | x+y+47=180 | | -z+23=6z+2 |