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+1/3 = -2/3 // + -2/3
a+1/3-(-2/3) = 0
a+1/3+2/3 = 0
a+1 = 0 // - 1
a = -1
a = -1
| t+2=13/8 | | 1/5+w=17/35 | | t+9=10 | | -w=-5 | | 2/3k=-4/9 | | b+1=4/3 | | 1+a=-4 | | 1+d=5/3 | | -13/30=x-1/10 | | 4/5w=8 | | 4=w+4 | | w-7/9=-97/9 | | -7m=35 | | -2/7d=-6/35 | | -1/10=b+1/2 | | -6+b=-4 | | -1/3b=-1/9 | | k+10=116/11 | | w+4/5=31/20 | | 39/5=d+7 | | -37/90=w-1/9 | | -7/8+n=-13/24 | | n-4/5=-7/15 | | t-2/5=-23/20 | | 7/4=k+3/4 | | d+4/5=54/5 | | x+3=29/10 | | k/-5=4/7 | | 5=b+5 | | b+1/2=13/10 | | b+1/3=-13/24 | | a+3/5=17/20 |