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)
15/x = 30/60 // - 30/60
15/x-(30/60) = 0
15/x-1/2 = 0
15*x^-1 = 1/2 // : 15
x^-1 = 1/30
-1 < 0
1/(x^1) = 1/30 // * x^1
1 = 1/30*x^1 // : 1/30
30 = x^1
x = 30
x = 30
| 9+2-3v=-9-v | | 8(x+7)-5x= | | 3=-2(1/4s-5)+3 | | 5x-1=-22*13 | | 5+b=3b+9 | | 2ln(6)-2ln(2)= | | 220=3+2(7-8n) | | X-8.5=-4.2 | | -8c=-9c+10 | | (5y-9)(8+y)=0 | | 6-5n=-6-3n | | 9s=-4+10s | | 10(11n+5)=-10n-10+9n | | -12=-4/5g | | (4y+8)-(5+3y)=8 | | y=-2x+x^2 | | m+2m+(10+m)=180 | | (3x+29)=(7x-19) | | 2ln(5)-2ln(2)= | | 60x=41/-1 | | 3x-26-5x=14 | | -4/5=12 | | -10-10u=8-8u | | -x+15=x+1 | | 0,3333333333333x=x-(5/10) | | 4+2b-12=8 | | 5+6m=5m | | 2.3q-1.5-3.9q=-0.6q-1.5 | | 5x+6-(3x-(5(x-2)-2))=2(x-13) | | 119=4+5(3-4n) | | -7+4p=5p | | (3/9)x=x-(5/10) |