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)
11 = k-1 // - k-1
1-k+11 = 0
12-k = 0 // - 12
-k = -12 // * -1
k = 12
k = 12
| b+7=-2 | | 9+a=15 | | 3/2(y+4)=(20-y)/2 | | -2+x=-2+2 | | -1+n=11 | | 3=b+1 | | n+1=-8 | | -5m=-50 | | t+10=16 | | 3.9q-1.1-5.3q=-2.4q-4.8 | | 3/4=9/n | | 5(-3)-4=8(-3)+5 | | -5x+8(2x-6)= | | 4ln(6x+3)-2=6 | | a-45=91 | | m-7=-14 | | b-9=-9 | | m+3=11 | | 6+d=13 | | w-5=-4 | | 3/2(y+4)=20-y/2 | | 0.3x=1.5x | | t-8=-5 | | -1/11*33 | | 14=w+7 | | 5+n=6 | | b/7=-3 | | -4+a=-10 | | -5x+16x-48= | | 33*-1/11 | | 24.8=t+5.1 | | y+54=80 |