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)
150/x = 300/650 // - 300/650
150/x-(300/650) = 0
150/x-6/13 = 0
150*x^-1 = 6/13 // : 150
x^-1 = 1/325
-1 < 0
1/(x^1) = 1/325 // * x^1
1 = 1/325*x^1 // : 1/325
325 = x^1
x = 325
x = 325
| 2(x+7)=28 | | -[5z-(9z+9)]=9+(3z+6) | | 5x-10=6x-2 | | V=4/3(3.14*12*12*12) | | 0.9(y-4)=-3(y-10) | | p(f)=60x^2-x^3+1500x-65000 | | 640.6=1/3(3.14•6^2h | | 6x+4=24+2x | | 6x+2x=30+x+5 | | F(x)=3x^3+8x^2+5-12 | | -6x-10=x-42 | | 14m+40=4m+10 | | 184=144+8h | | 8x+25=9 | | 10x+18=4x+150 | | 3(x-3)+12=3x+3 | | 5n+4=3-4(n-2) | | V=4/3*3.14*1728 | | 0.7x-1.3=0.8 | | y-2x=-18 | | 4x+16y=40 | | 0.13-0.02(x+3)=-0.03(1-x) | | 5x+40-7=103 | | 32x^11/6x^2 | | 0=-1385+18790 | | 7(2x-3)+6=2(-6x-20)-1 | | 0.6x+0.6=0.9x-0.9 | | 17x+37=-66 | | 3m/7-2m/7 | | C/4-2=3 | | 2m/7-m/7 | | 8x-7=6x+6 |