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)
2*(6-1*k) = 28 // - 28
2*(6-1*k)-28 = 0
2*(6-k)-28 = 0
2*(6-k)-28 = 0
-2*k-16 = 0
-2*k-16 = 0
-2*k-16 = 0 // + 16
-2*k = 16 // : -2
k = 16/(-2)
k = -8
k = -8
| 3(6k+2)=60 | | 4(3-7b)=-44 | | 10.1d+-5.64=10.4d | | X-6=26 | | -5.94+-13.7n=-13.1n+4.32 | | 3(x-3)+12=32 | | 3(-10+w)=-30 | | 3(6b-6)=36 | | X-1=28 | | 5(-2+3m)=-25 | | 5(a+3)+4=a-1 | | 5/2-3(511)=53 | | X-27=28 | | 8n+-12=6n | | 3(1+4w)=-93 | | 5(-5a+8)=165 | | 7(-2+3m)=70 | | .40x+(.74)(500-x)=235 | | 5/2-3(5.11)=53 | | 8+14g=19g+-7 | | 7(3n+9)=147 | | 7(6w+5)=539 | | 3(1k-1)=6 | | 4(-7+7m)=168 | | X-1=26 | | 50-23d+d^2=0 | | 4(-2+3a)=16 | | 20+12b=15b+-20+1 | | 2(5d+5)=-90 | | 24+(x-13)=5 | | 6(-4d+9)=-114 | | X+4=27 |