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 = 180/x // - 180/x
40-(180/x) = 0
40-180*x^-1 = 0
-180*x^-1 = -40 // : -180
x^-1 = 2/9
-1 < 0
1/(x^1) = 2/9 // * x^1
1 = 2/9*x^1 // : 2/9
9/2 = x^1
x = 9/2
x = 9/2
| 9621=x*x*x | | 2.3-4x=7x | | 10u-2u=40 | | 17x=-28+3x^2 | | .82s=6.92 | | .82=6.92 | | 1/3x-1/6y=-4 | | 42x-50= | | 3f-12=6 | | 5y-25=-5(y-7) | | y-14.64=3.16 | | 8(v-7)=-3v+21 | | (x-3)(x+0.5)(x-1)=0 | | n-4=5.7 | | 18/5=(f-32)/9 | | -4(-3n-1)+4n=4+n | | 4(2z+3)=6+13 | | 2c=10.08 | | 9-4(2)= | | -8t-9=-42 | | -a/-8=3.6 | | C/5=(f-32)/9 | | -0.55p-4=0.45p | | 2.3=u/2 | | -3+3x=-22(1-x) | | f/7=1.2 | | b-43=21 | | 19.5=p+4.5 | | k-4=40 | | q/4=3 | | n-92=-45 | | 7(1+4n)=-133 |