If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
13/x = 39/27 // - 39/27
13/x-(39/27) = 0
13/x-13/9 = 0
13*x^-1 = 13/9 // : 13
x^-1 = 1/9
-1 < 0
1/(x^1) = 1/9 // * x^1
1 = 1/9*x^1 // : 1/9
9 = x^1
x = 9
x = 9
| 2x-5x+6x=23 | | 7/x=28/36 | | 7x^2-14x+58=0 | | 3x+9=3x-48 | | 25-6x=4 | | 8x-3=-19x+6x | | 24x+4=26x-4 | | 7/49=x/7 | | x^2+ax+25=0 | | 6xw*5w= | | (13x+2)+(5x+24)+(7x+7)+(8x-3)=360 | | t+4t=32 | | x(.01)=5 | | 1/2y-6=-15 | | 6x+8(-3)=28 | | 7(9x+6)=20.5+9.5 | | 7x-4=-102 | | 6t=t+77 | | 8x+6(0)=28 | | x/12=20/120 | | 12x+7+x=180 | | 2y-3=2y+21 | | ((8x^(3)y)/(12xy^(6)))^(-2) | | 35.50= | | n^3+2n^2-36n-72=0 | | 5a+6=3a+16 | | (x-7.1)-0.5=4.5 | | 3/4=x/9 | | 6912=432x^2 | | 39=5x-6 | | 9y^4-7y^2-16=0 | | 7x-4=-104 |