If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
b-2/5 = 13/5 // - 13/5
b-2/5-(13/5) = 0
b-2/5-13/5 = 0
b-3 = 0 // + 3
b = 3
b = 3
| -7m+1=-23/5 | | 7+1/7m=50/7 | | 1/2-7m=-153/2 | | 2/3+4/5k=106/105 | | 4/7d+2/5=54/35 | | 1/6+5/7t=31/6 | | 3d+2/5=53/20 | | -7d+5/7=-127/28 | | 8-7w=15 | | 6-4/5b=-14/5 | | 3/7k+1/9=277/63 | | -6-3/5w=-48/5 | | -1/2a-10=-25/2 | | 1+1/5b=17/15 | | -7d+4=-38 | | 1/3a+9/10=107/30 | | -6b+7/9=-35/9 | | 10+1/7x=484/49 | | -7n+1/2=-153/2 | | -t+1/7=78/7 | | 6/7x-10=-788/77 | | 2/3a-2=-4/3 | | 3x+3/4=141/44 | | -6x+4/9=-280/99 | | 1/3-1/2m=43/66 | | 3d+3/7=44/21 | | 4d+1=5 | | 4m+3/10=-11/30 | | 7k-7=-49/4 | | -6t+1/2=9/2 | | -d-7=-38/5 | | -7w-5/7=-172/35 |