If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
16 = k+4 // - k+4
16-k-4 = 0
12-k = 0 // - 12
-k = -12 // * -1
k = 12
k = 12
| m-1=5 | | n+6=17 | | t/-2=-3 | | b-6=-13 | | 3+b=3 | | n+1=5 | | -7+w=-14 | | b-10=-11 | | w-5=-16 | | 2+m=5 | | 0=d-7 | | w-8=-8 | | m-9=0 | | -17=t-10 | | 20=b+9 | | 2n=22 | | 5=b+9 | | -7m=-70 | | k-9=-1 | | m+10=19 | | -0.4(x+3)=47 | | -12=k-3 | | 10+m=7 | | 0=t-5 | | 19=n+7 | | 3+k=-3 | | -3w=30 | | 2y^2=2y-11 | | 4x-4y=16 | | -5t=30 | | 17=x+7 | | x-ac=ay |