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)
(5/8)*x*(5/x-7) = 0
5/8*x*(5*x^-1-7) = 0
( 5*x^-1-7 )
5*x^-1 = 7 // : 5
x^-1 = 7/5
-1 < 0
1/(x^1) = 7/5 // * x^1
1 = 7/5*x^1 // : 7/5
5/7 = x^1
x = 5/7
( 5/8*x )
5/8*x = 0 // : 5/8
x = 0
x in { 0}
x = 5/7
| X=-33 | | -27+75n^2=0 | | 3(x-1)+4(x+2)= | | 4+3y=2x | | 13+x/3=35 | | -17c+11c+13+14= | | 75=(-0.015x^3)+(0.6x^2)-2.4x+19 | | (-1.4x-y-2.9x)+(-1.9x-y+.6x)= | | 10y-6=-36 | | 2x+6y=9 | | 10x-6=-36 | | 5k+3=6k+5 | | -2x-20=3x+10 | | 5+9+11= | | -x^2-9x-8=0 | | 4p+5p-15=8+p+2 | | v-7=19 | | -13/5y=-26 | | -1-2/7v=2 | | -1-2/7v=2 | | (2a-b+4c)+(-9a-6c)= | | (2a-b+4c)+(-9a-6c)= | | 15=2x+7x+6 | | 1.2x-2=3.4x-13 | | 1/4(60+16s)=13+5s | | 11x+5+x^2=0 | | x^2-20x=-8 | | 12(-16-15s)= | | 7x^2+8x-6=0 | | x+18=4x+6 | | x+10/6=8/5 | | x+(x+1)2+(x+2)3=170 |