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)
15/x = 2.8 // - 2.8
15/x-2.8 = 0
15*x^-1 = 2.8 // : 15
x^-1 = 0.18666667
-1 < 0
1/(x^1) = 0.18666667 // * x^1
1 = 0.18666667*x^1 // : 0.18666667
5.35714276 = x^1
x = 5.35714276
x = 5.35714276
| (7x-1)(x^2-3x+1)=0 | | 18.75/X=2.8 | | -5(x+4)=-2(2x-1) | | 8x-9=12+12x | | E^2x=66 | | 8x-9=11+10x | | 18/x=2.8 | | 21/8x1000 | | 14/x=3.2 | | -8x-1=-x+8 | | 3(6+x)=14 | | 16.4/x=2.8 | | 15x+15=-5x-1+4x | | -6x+8=-5x | | 20/x=2.8 | | 21/x=2.8 | | 22/x=2.8 | | 360a=4950 | | 12y^2-37y+21= | | 5(2x+4)-7x=9 | | 15x^2+19x+6= | | 4x+6y+10z=5 | | 3=5.2(x+3) | | 21y^2-16y-20= | | 3x+4=21+2 | | s^3+2s+3s^2+6=0 | | 24/21=9/15 | | -11-(-40)=x/12 | | -2-(-10)=x/2 | | s^3+6s+9=0 | | 2=-12y-y | | 100x(X)=153 |