If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( f )
f = 0
f = 0
f = 0
f in (-oo:0) U (0:+oo)
56/1.5 = 35/f // - 35/f
56/1.5-(35/f) = 0
56/1.5-35*f^-1 = 0
-35*f^-1 = -37.33333333 // : -35
f^-1 = 1.06666667
-1 < 0
1/(f^1) = 1.06666667 // * f^1
1 = 1.06666667*f^1 // : 1.06666667
0.9375 = f^1
f = 0.9375
f = 0.9375
| 3.5/a=1.5/0.3 | | K/10=36/45 | | 12/13=48/w | | 9/12=21/m | | 12-2y=10 | | -0.2t^2-14t=0 | | 6a^2-60a+150=0 | | Y+11=17 | | 12+2y=14 | | 5x-36=3x | | 8+4(x)=-4 | | -4x=-13 | | 6x(2x+3)= | | -2.4x=12.96 | | 7+15y-1=6y+90-3y | | u=v-14 | | 0.09(8x-7)=0.72(x+7)-5.67 | | -(7x+18)=10 | | secx=1.27 | | -6(5c-8)=-12 | | 84/15 | | 5x-3(1x-5)=13 | | 8-h/3=28 | | 2(4z+9)=10 | | z/6=-28 | | -9x+5(2x-5)=-16-8x | | 12=p+s | | 1/7x=-7 | | -2.4x=31.44 | | 6/5*14/3 | | 2+65=n | | 2x-6/4=5 |