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)
40/x = 8/2 // - 8/2
40/x-(8/2) = 0
40/x-4 = 0
40*x^-1 = 4 // : 40
x^-1 = 1/10
-1 < 0
1/(x^1) = 1/10 // * x^1
1 = 1/10*x^1 // : 1/10
10 = x^1
x = 10
x = 10
| x+0.1(6)=0.9(x+6) | | Solve+3=3 | | 5y^2-5y-150=0 | | y^2-y+1/4 | | 45+35x-15-2x=135 | | 15x^2+16x=-7 | | -4a-2a+11=6 | | 13/5*10 | | 11z-(5z-26)= | | 4(y+5)=56 | | X^3-8x-12= | | 13/5*10=9x/10*10 | | X^3-8x-15= | | X+(7.8-1.2)=5.42 | | 2x^2-6x+30=0 | | y=30-6x+2x^2 | | 11z^2+7=106 | | b/9+7=13 | | 7x^2-13=50 | | 6X-5Y=12FORY | | 35X+17=12 | | a/12-1=4 | | (-4x^4y)(x^3y^5)= | | 138=x+(x-6) | | x/5+23=30 | | -32/-2 | | 7n^2=28 | | X^3-7x^2-13x-3=0 | | p^2-196=0 | | 1/5(10x-6)=4 | | (10x-6)=4 | | p^2-256=0 |