If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
a+10 = 9 // - 9
a-9+10 = 0
a+1 = 0 // - 1
a = -1
a = -1
| t+1/5=13/40 | | 3/4m=3/14 | | k+10=39/4 | | (x-2)(x+1)=(x+3)(x-1) | | w-2=-7 | | n^2=50 | | 6+t=7 | | 7m=-14/3 | | n+1=-2 | | a+8=86/11 | | 6m=-27/5 | | 1/6t=1/12 | | 6(x+1)=3(x-2) | | 10+3m=4m+6m | | 31/4=w-1/4 | | -8+a=-7 | | d-4/5=-11/20 | | a/7=-3 | | 2x/5=x-3 | | m/4=5/7 | | -2/3w=-4/27 | | 9/3m=3m+4 | | -a=-1/3 | | t/-7=-2/3 | | x-1/2=-11/2 | | b+8=17 | | k+7=32/5 | | 19/12=w+1 | | -23/4=n+1/4 | | 4/9+m=85/9 | | x+9=109/12 | | 7/10+n=29/20 |