If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
12-(7/y) = 1/3 // - 1/3
12-(7/y)-(1/3) = 0
12-7*y^-1-1/3 = 0
-7*y^-1 = -35/3 // : -7
y^-1 = 5/3
-1 < 0
1/(y^1) = 5/3 // * y^1
1 = 5/3*y^1 // : 5/3
3/5 = y^1
y = 3/5
y = 3/5
| 3x*7*x= | | 2(x+2.90)=19.60 | | 7x-2=7(x+6) | | -4+4x=5x-1 | | 8x^2+12=-22x | | 23=3s-4(24-s) | | 6x-10=4x-14 | | y-36=11 | | 0.65x+4.99=6.94 | | 5(x-8)= | | 49c^2-64d^2= | | -.33x+y=-2 | | 7x+8=24+3x | | 7x+1=-7x-125 | | (2m-10)/19=(m/10) | | b%2.4+3=13 | | 5m^2-10m-15=0 | | 4x-8+5-3x=3 | | 0.50=log | | 12n+72=72+12n | | 4=-5x+x+8 | | 8x-7=4x-2 | | -64-2x=62-8x | | 4(x+3)-2x=-2(2+x) | | x/5-9=2 | | 5x+9+4x=-54 | | 13=-6x+4x+7 | | 7a+39=2a | | 2-5/6v9/4-1/6v | | -4/1x=2/3 | | 2x^2-8x-10=10 | | 48y^5=27y^3 |