If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( y )
10*y-13 = 0
10*y-13 = 0
10*y-13 = 0
10*y-13 = 0 // + 13
10*y = 13 // : 10
y = 13/10
y in (-oo:13/10) U (13/10:+oo)
1/(10*y-13) = 0
y belongs to the empty set
| x+4/10=x-2/8 | | -7x=15-5x+15-6 | | 7/x=5/6 | | y=7(1)+2 | | 2=3(x-3)+5-2x | | 405+y=540 | | 1/6+2/3+1/4 | | .75x-0.5=1 | | 9[1-(-6x-2)]=486+171 | | 20n-6=9 | | 405-y=540 | | 9n+18-11n=34 | | 1/3x1/4x8 | | 8/3=x/4 | | 3x-5=21+5x | | y=7(0)+2 | | 71+y+81+100=360 | | 148+112+(3x+10)=540 | | 131=0.08x+27 | | (7x+13)+(8x-8)=360 | | Y=1/3(3)-6 | | (V+5)2=5 | | 3x+4=360 | | 5.2=5x+2.3 | | 2x^2-5x=11 | | y=0.08(100)+27 | | x+1.5=9.7 | | 2d+12d= | | y=0.08(50)+27 | | (a+4)=6a-6(8-a) | | 6/5+4/5x=27/10+7/2x+1/2 | | 5x-3x+12x+14=3(2+3) |