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)
12/5 = 4/x // - 4/x
12/5-(4/x) = 0
12/5-4*x^-1 = 0
-4*x^-1 = -12/5 // : -4
x^-1 = 3/5
-1 < 0
1/(x^1) = 3/5 // * x^1
1 = 3/5*x^1 // : 3/5
5/3 = x^1
x = 5/3
x = 5/3
| 7j-5j=20 | | 7/4-3y=6y-1/20 | | 2g+9=19 | | 143(3x+2)=560 | | 64/4=44a | | c+r=4 | | 2x+y=1.60 | | 4/7=r/5 | | -7+-d=-15 | | 13-12r=12 | | 60000/130000000 | | 2(8r^3+r)-4r= | | 4n-n=15 | | 342=6(1-8n)-8n | | 5Xw=50 | | -30.5-6.5z=9(4z-7) | | (x/5)-3=-4 | | -1b-2=-4 | | 64/4=44@ | | x+2y=170 | | 9w=4500 | | 8*6-4*3+(25)= | | 18a-13a=15 | | 4m^2-1m+4=0 | | 4j-2j=12 | | (x-4)(2x-1)(x-3)=0 | | -4+9.5(1-3.5r)=20.5 | | 6m-5m=11 | | X(.4)+x=7.99 | | 3(3x-2)+4(2x+2)=70 | | 8n-7n=4 | | 4t^2+1t-4=0 |