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)
6.5/x = 4 // - 4
6.5/x-4 = 0
6.5*x^-1 = 4 // : 6.5
x^-1 = 0.61538462
-1 < 0
1/(x^1) = 0.61538462 // * x^1
1 = 0.61538462*x^1 // : 0.61538462
1.62499999 = x^1
x = 1.62499999
x = 1.62499999
| 3y-y^3*3y^2=0 | | -3.5xsomething=14 | | 12n+17=32-3n | | 1(4z-1)=3(z+2) | | 9x^4-15x^3+3x^2=0 | | 2x^2+5x-340=0 | | 45=20-10t | | 8*x-18=7*x+13 | | -10x+7y=14 | | 8m-3=39+m | | -5=xy+3x | | 24x^3+20x^2=0 | | 36/6a | | 15+5x=145 | | 18/2a | | 65+1=12 | | 4q-5/2=1/2 | | 9=8mn | | 17-2y=45-9y | | 3m+16=4m+8 | | 65s+12=1 | | 3y*3y^3u^4*2u^9= | | 2x+5y-x-3y= | | 40t=t+4t | | x=0.5x+70 | | 5x+3=51-x | | -18m+8=m-7 | | 2=-5x+2(3x-5) | | 49k^2-9=0 | | 5n+25q=360 | | 18+-2y=26 | | n+q=28 |