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)
140/100 = 112/x // - 112/x
140/100-(112/x) = 0
140/100-112*x^-1 = 0
-112*x^-1 = -7/5 // : -112
x^-1 = 1/80
-1 < 0
1/(x^1) = 1/80 // * x^1
1 = 1/80*x^1 // : 1/80
80 = x^1
x = 80
x = 80
| 3u+2u+5=0 | | 26=(-3)(3)+32 | | 4v^2=-9v-2 | | 5(z+7)=75 | | 3n+9+11=6 | | 1/5(z+2)=2/3(z-1) | | X+8.5=13.7 | | -10+2d=-8 | | 3(5-m)=(2m-1) | | x-0.1x=0.75x+4.5 | | 112/100=x/140 | | 4x/3-x=x/15-8/5 | | w^2+16w+63=0 | | X-4.5=18.6 | | -7*-15=-4x-18 | | x/113 | | 2z+15z=17 | | 8a+3b=30 | | -4-5(-4z+4)=-3(6z-5)+8 | | 140/100=x/112 | | 4x+9=x-5 | | 0=-1/9x+38 | | 5y-2=20-6y | | 23-17=3(x-7) | | 950+900+4x=850+400+7x | | X-8.7=18.6 | | 26=-2*3+b | | 5x+11/3-9=8 | | y=-1/9x+38 | | 4x+5x=135 | | x^2-3x+1=48 | | -(5+6)=2(3a+8) |