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)
0.1425 = 76.95/x // - 76.95/x
0.1425-(76.95/x) = 0
0.1425-76.95*x^-1 = 0
-76.95*x^-1 = -0.1425 // : -76.95
x^-1 = 0.00185185
-1 < 0
1/(x^1) = 0.00185185 // * x^1
1 = 0.00185185*x^1 // : 0.00185185
540.00054 = x^1
x = 540.00054
x = 540.00054
| 7.5=2.7/x | | X+x+50=210 | | -a^2-14a=0 | | 9b+6b+4b+7b-3b= | | (7t)+2=51 | | 3a+4a-7a-3a+5a-2a= | | 2x+10=30x | | -6k+(-12)=72 | | 2/5-2k=(-1/3) | | 4x-3(4-5x)=9-(x-19) | | 1x-7=2x | | 2a(21)=420 | | 14=3B^2+4AB | | 0.01x+1=2 | | 5x-9y*5y-3x=0 | | 0.01+1=2 | | (3x+6)4=3 | | 0.7328=X/4.7 | | 7-3y=31 | | 9(p+7)-6=9-2(p+9) | | X+-24+18=126 | | x^4=0.5 | | 5-x=10-3x | | -x/y=21 | | 3.1x-7.86=6.4 | | 0.4x-6=12x+1.2 | | 1x+7(3x+47)=89 | | 39-19=100 | | 39+19=100 | | 2y+8+4y=9y-6-7 | | X+7(3x+47)=89 | | 3/10n=1/2 |