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-4 = 0
y = 0
y = 0
y-4 = 0
y-4 = 0
y-4 = 0 // + 4
y = 4
y in (-oo:0) U (0:4) U (4:+oo)
(3*y+1)/y = (2*y-5)/(y-4) // - (2*y-5)/(y-4)
(3*y+1)/y-((2*y-5)/(y-4)) = 0
(3*y+1)/y+(-1*(2*y-5))/(y-4) = 0
((3*y+1)*(y-4))/(y*(y-4))+(-1*y*(2*y-5))/(y*(y-4)) = 0
(3*y+1)*(y-4)-1*y*(2*y-5) = 0
y^2-6*y-4 = 0
y^2-6*y-4 = 0
y^2-6*y-4 = 0
DELTA = (-6)^2-(-4*1*4)
DELTA = 52
DELTA > 0
y = (52^(1/2)+6)/(1*2) or y = (6-52^(1/2))/(1*2)
y = (2*13^(1/2)+6)/2 or y = (6-2*13^(1/2))/2
(y-((6-2*13^(1/2))/2))*(y-((2*13^(1/2)+6)/2)) = 0
((y-((6-2*13^(1/2))/2))*(y-((2*13^(1/2)+6)/2)))/(y*(y-4)) = 0
((y-((6-2*13^(1/2))/2))*(y-((2*13^(1/2)+6)/2)))/(y*(y-4)) = 0 // * y*(y-4)
(y-((6-2*13^(1/2))/2))*(y-((2*13^(1/2)+6)/2)) = 0
( y-((2*13^(1/2)+6)/2) )
y-((2*13^(1/2)+6)/2) = 0 // + (2*13^(1/2)+6)/2
y = (2*13^(1/2)+6)/2
( y-((6-2*13^(1/2))/2) )
y-((6-2*13^(1/2))/2) = 0 // + (6-2*13^(1/2))/2
y = (6-2*13^(1/2))/2
y in { (2*13^(1/2)+6)/2, (6-2*13^(1/2))/2 }
| 1/8y-y+3y | | 7x+10y=119 | | -z+3/5-1=z/3+z | | 3(2x+11)=6x | | 6y/5+11/4=-7y/6-5/6 | | 6+x+9/5=6x-x/3 | | -9z/4+11z/6-1/4=5z/4 | | 6x-2/9=-6x+4/4-3x | | 8x+4(1/2x+x)=300 | | -1+7y/4-2y/5=-3y/2 | | -7y+10/9=10y+8/4+y/2 | | 11/2-5y/3+9=-12y-5y/6 | | 5/4-4z-3z=11z/3+6/7 | | -2-2(1+2k)=-(5+3k)-8 | | 30-5n=6(6n+5) | | -5/6+3+11z/5=z-2z/3 | | x/2-19 | | 3z-11/6=5/3+7z-9/6 | | 5z/2-3/2-1=3z/7+3z/4 | | m=-3/8 | | m=1/3 | | 5x/2-8/3=2x-11x/5 | | -4x+11/8=-11/7+6x+1/3 | | 8x+5=3x+24 | | 3x+17=2000 | | 3x+17=190 | | 162=2(3)x | | 7+4x=10x+15 | | y=kx+b | | -23x+29=5 | | 14+6x=78+2x | | 4x+2x+18=5x+x+18 |