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/(-7) = 6 // - 6
b/(-7)-6 = 0
-1/7*b-6 = 0 // + 6
-1/7*b = 6 // : -1/7
b = 6/(-1/7)
b = -42
b = -42
| 7=x-3 | | 5w=5 | | -5+b=5 | | a+7=8 | | m+5=-1 | | k-3=-5 | | k-5=-9 | | a/3=6 | | d/-6=7 | | 10+w=15 | | d+7=0 | | -9=w+3 | | d+10=5 | | a+2=11 | | w-8=-7 | | m+7=17 | | 3+n=2 | | 5=k-7 | | 6w=-60 | | d/-3=6 | | -21=t-10 | | k+8=18 | | 19=w+9 | | t/-3=7 | | w+6=7 | | -6+n=-5 | | 14=m+3 | | d+4=15 | | 12=t+7 | | 9+t=9 | | V=a+z*b*h/2 | | 11=b+8 |