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)
X/7 = 7/x // - 7/x
X/7-(7/x) = 0
X/7-7*x^-1 = 0
-7*x^-1 = -(1/7*X) // : -7
x^-1 = 1/49*X
-1 < 0
1/(x^1) = 1/49*X // * x^1
1 = 1/49*X*x^1 // : 1/49*X
49*X^-1 = x^1
x = 49*X^-1
x = 49*X^-1
| 10=log(2x) | | -3w-3(-4z+6w)+6z=1 | | 4/x=12/43 | | 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 |