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)
28/x = 4 // - 4
28/x-4 = 0
28*x^-1 = 4 // : 28
x^-1 = 1/7
-1 < 0
1/(x^1) = 1/7 // * x^1
1 = 1/7*x^1 // : 1/7
7 = x^1
x = 7
x = 7
| -0.31-(-0.39)=0.08 | | 12=-3x+15 | | 3/8-1/4x=1/16 | | -0.2+(-0.02)-3=-3.22 | | -5r-4(1+6r)=228 | | x+4.94=7.26 | | 8=32/s | | 18=-7x+25 | | S=180n-360n | | p-4p+9+5p= | | -4(6x+5)=-164 | | -8(7+2n)=-104 | | 9x^4-144= | | -4-5(1-8x)=271 | | 0.01+(-32)-(-0.09)=-0.22 | | -4(7x-6)=248 | | 5(5+2x)=9(x-1) | | y-2.52=9.8 | | X-2/y=z | | 2-3x+4+5x=8-(x+2) | | 8-7(n-3)=85 | | 268=8(5-8x)+7x | | -0.001+0.009=0.008 | | 7(-x-8)=-112 | | -1.5x=3 | | y+4.4=8.48 | | 4t-5=6+7t | | -6(x+7)-8=-92 | | -0.2+(0.02)-3=-3.22 | | -4(7x-4)=156 | | 18x+20+x=5+10-3 | | Y^2-4y-14=0 |