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)
5/18 = 15/x // - 15/x
5/18-(15/x) = 0
5/18-15*x^-1 = 0
-15*x^-1 = -5/18 // : -15
x^-1 = 1/54
-1 < 0
1/(x^1) = 1/54 // * x^1
1 = 1/54*x^1 // : 1/54
54 = x^1
x = 54
x = 54
| v/18.75=3 | | 34f-85=19f+20 | | 4*x^3+3=0 | | 7y=49-84 | | 3k^2+5k-50=0 | | 7y+7=y+79 | | 6a+2n=8 | | (8x-40)/6 | | -10=5-3x | | 8k+73=18k-87 | | 2x+4y-3z=15 | | 6x-2/4=x-2 | | -27+2x=-5 | | 2(8r-1)=110 | | -2t-4t=12-6 | | 7y-49x=84 | | 7/5=12/x | | 45=5m-100 | | (x-50)/5 | | 17y-9y=48 | | 5/7=12/x | | 3(d+3)=5(7d-43) | | 18/5=15/x | | 4x+24=72-2x | | g(x)=(x-3)(x+1) | | 20/30=100/x | | 3=6/q | | 5X=6Y+8 | | 4w-3=2w+3 | | 5/4=x/1 | | 93+-5x=105+-8x | | 8/50=x/150 |