If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
9*x-2 = 0
9*x-2 = 0
9*x-2 = 0
9*x-2 = 0 // + 2
9*x = 2 // : 9
x = 2/9
x in (-oo:2/9) U (2/9:+oo)
y = (8*e^2*x)/(9*x-2) // - (8*e^2*x)/(9*x-2)
y-((8*e^2*x)/(9*x-2)) = 0
y-8*e^2*x*(9*x-2)^-1 = 0
(-8*e^2*x)/(9*x-2)+y = 0
(-8*e^2*x)/(9*x-2)+(y*(9*x-2))/(9*x-2) = 0
y*(9*x-2)-8*e^2*x = 0
9*x*y-8*e^2*x-2*y = 0
9*x*y-8*e^2*x-2*y = 0
9*x*y-2*y = 0 // + -2*y
9*x*y = -(-2*y) // : 9*y
x = (-(-2*y))/(9*y)
x = 2/9
x-2/9 = 0
(x-2/9)/(9*x-2) = 0
(x-2/9)/(9*x-2) = 0 // * 9*x-2
x-2/9 = 0
x-2/9 = 0 // + 2/9
x = 2/9
x in { 2/9}
x belongs to the empty set
| 3x^2+24x+46= | | 2x^4-16x^2+5=0 | | 120=.6x | | 5x-6=2x-8 | | -4x^2-40x-40= | | 6(2)+2y=12 | | 6.7x-2=3.7x+19 | | 8x^2-26=3x | | I=prt/4 | | 3(x-4)+8=-10 | | 13-p=p-3 | | 6-7(8X-4)=-(7-9X)-(X-9) | | 3/8b-6=10 | | 2(6x+4)-5x=4x+11 | | 4x+6-7x=4+8x-9 | | 5x+16=3x+2 | | 1+3x=5(4+3x) | | 3(4x+6x)+7x=20 | | 5/7x-2=23 | | 3x-19=x+13 | | -18-3y=6 | | -3k+10=1k+3 | | -4x^2+9x-19=0 | | (8n-2)/7=6 | | (8n-(-2)/7)=6 | | 3(4x+6x)+7=20 | | X=24+2x | | 24x-39=23x-37 | | 17×6/3 | | 19x+21=21x-19 | | 4+3x=36 | | f(-3)=4x^2-1 |