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)
7.2/56 = 5.4/x // - 5.4/x
7.2/56-(5.4/x) = 0
7.2/56-5.4*x^-1 = 0
-5.4*x^-1 = -0.12857143 // : -5.4
x^-1 = 0.02380952
-1 < 0
1/(x^1) = 0.02380952 // * x^1
1 = 0.02380952*x^1 // : 0.02380952
42.00000672 = x^1
x = 42.00000672
x = 42.00000672
| 5x^4-2.5x=0 | | 48/(3/4) | | -2x+1y=-3 | | -30x-5y=40 | | 5x^4-5/2x=0 | | x+(.06x)=20 | | -6x+1y=5 | | 21x-7=-14 | | 14[3-(2-2x)]+7x=5(7x+3)-1 | | 40x+44=4 | | -6.8+3y+2.4=4.3-3g | | 45-2/3h | | 2[3-(2-7x)]+x=3(5x+3)-7 | | c^3/5*c^1/2 | | 32x=24(27) | | 13=3x+16 | | M+8m=396 | | x+(x-1)=159 | | 2y/3x=6 | | -4x+7x-10=3(x-3)-15 | | 6x+7x+5=96 | | -4x+71-10=3(x-3)-15 | | -40x=54 | | -39x=54 | | 3x-5+7x=-20 | | 3x-5+6x=-20 | | 6x-20=15+x | | Xx-144=0 | | 0.02x+0.17(x+8000)=2690 | | (25-1)=225 | | 2(6x-4)+2=12x-6 | | 8x-7x-5=-12 |