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)
120/x = 20 // - 20
120/x-20 = 0
120*x^-1 = 20 // : 120
x^-1 = 1/6
-1 < 0
1/(x^1) = 1/6 // * x^1
1 = 1/6*x^1 // : 1/6
6 = x^1
x = 6
x = 6
| y=2.2x+3 | | -1.7(3G-9)-1.3g= | | 2(y-5)-7=-15 | | 76=2c+c+10 | | 1x-6x=x^2 | | 8x+11=-6x-20 | | x^4-12x^2+16=0 | | 3b-17=7b-13 | | 4+9(-5r-4)= | | (x+10)(x+20)=0 | | 15/7=x/42 | | s^2+7s=-18 | | -1.5y=x-45 | | 50=x/4 | | 35793587935325879=238723879 | | 4n+3+2n+10=79 | | x^2+y^2+9=0 | | -9+9(-7x-4)= | | 7x-3/5 | | 2cos(x/3)=0 | | 0=3cos(3x) | | 12a-74=46 | | 0.25x^2-7x-24=0 | | Y=(1.75)x | | 6(5x-3)=42 | | 10t=p-7p+2(r+s) | | 5b+2a+10=82 | | 2a-4a=14 | | (8x-6)-(6x-9)= | | 4(y+3)=-4(2y-6)+3y | | 4x-9x+4=x-3+7 | | 3a=6-a |