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)
4/x = 12/43 // - 12/43
4/x-(12/43) = 0
4/x-12/43 = 0
4*x^-1 = 12/43 // : 4
x^-1 = 3/43
-1 < 0
1/(x^1) = 3/43 // * x^1
1 = 3/43*x^1 // : 3/43
43/3 = x^1
x = 43/3
x = 43/3
| X^2-2-8=4 | | (2w-1)(7-w)=0 | | 14-4a=14 | | 14x+98=10 | | x+(x*.5)=60 | | 12x+2y=66 | | 12x+2y= 66 | | f=2x^2+12x+17 | | 1.06x=3.18 | | 0.5(9+7)-0.75(-12-12)= | | 13x+5=85 | | 7-(-2)-8+4= | | cos(45)=x/100 | | (60/√15*√3)/6 | | (X+4)(2x-1)= | | 3a+1-4=-a+7 | | 50x+20y=2400 | | (80*x)^1/3-(10*x^4)^1/3 | | 3f^2+7x+4=0 | | 2c-16=7 | | (-8g^2-3g+7)-(-3g^2+5g-5)= | | 2a^2+7a-22=0 | | 36=x*360/9000 | | 3x+3-4x=12 | | 3x+4-3x=9 | | 25=-5-5x | | 10=360/x | | 920=5(x+16) | | 14xy^4/35y | | x+x+3x= | | 2cos^3(x)-7cos^2(x)+3=0 | | 40160p(x)=8x-1600 |