If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( q )
q = 0
q = 0
q = 0
q in (-oo:0) U (0:+oo)
9/q = 9 // - 9
9/q-9 = 0
9*q^-1 = 9 // : 9
q^-1 = 1
-1 < 0
1/(q^1) = 1 // * q^1
1 = 1*q^1 // : 1
1 = q^1
q = 1
q = 1
| 4a-8a=6a | | |-3x-1|=7 | | x+47+2x=x+69 | | -3(w-3)=7w+39 | | 2n(n+5)=-4(n+5) | | 11x+25y=180 | | -20y=25y | | 2y-4=-3(y+8) | | 7n^2-35n-98=0 | | 25y=50 | | 15/60=n/6 | | 25=50 | | (2x+40)*(x+6)=4x^2 | | 2x+1=9x-1 | | 0.25(5+x)+0.75(x+1)=2.5 | | 2(w+6)=-7+30 | | F(6)=8 | | 4n^2-16n=44 | | 15+6r=7(4r-1) | | 2(w+6)=7w+30 | | x+70=2x | | 4.5x=100 | | (3x+20)(x-10)=0 | | x+1=2x+12 | | -144=-12r | | 3i(8+5i)=0 | | 5/x-3cosx | | 5x/12=1 | | 15+6t=7(4r-1) | | g/-16 | | 2x+8=3+2x | | 2(x+h)+k=8 |