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)
25.2 = (68/x)*x // - (68/x)*x
25.2-((68/x)*x) = 0
25.2-68 = 0
-42.8 = 0
x belongs to the empty set
x belongs to the empty set
| 205=30k+25 | | 2x-5=2y+5 | | d/dy(x^2-y^2) | | (x+5)(x-4)=-14 | | 27=14-(x-3) | | 62=1.2x+1.1y | | 11(x+13)=-2(x-4)+5 | | 120=-8(m-8) | | 8=1-n+5 | | -11+16x+32=3x+8 | | 6b^2-384=0 | | 30=13-(x-5) | | 169=7m-6(1-3m) | | he-4K=0 | | 3f-2f+f= | | 6x-(2x+11)=1 | | 5-2a=5 | | 6x-(2x+11)=11 | | 8(x-2)-3(1-x)=9(x+2) | | 2(7+x)=-20 | | 500=1.5x-(700+1.25x) | | 5/7v-2w=3z | | 2r-21.6=3r+5 | | Y-3=-5/3(x-5) | | x*3+5=20 | | 4x^2+(4k-3)x+1=0 | | 6+9k=-93 | | 13-n=3-3n | | 14+8n=8n+2n | | 400=1.5x-(900+1.25x) | | (11x-7)/2 | | (-4/5)2 |