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)
7*k+4*k+8 = 52 // - 52
7*k+4*k-52+8 = 0
11*k-44 = 0 // + 44
11*k = 44 // : 11
k = 44/11
k = 4
k = 4
| 3-5w-4w=57 | | -d+6+6d=61 | | b+2+6b=-33 | | 5+t+t=9 | | -6a+2-4a=-68 | | -10=-4m-m+5 | | x^2-12x+9= | | -7w+9-7w=-117 | | -31=4d+2d-7 | | -m+2-m=-16 | | 15=7t+5t+3 | | 2k+6+4k=18 | | 9+3d-7d=-23 | | -75=-6d-2d+5 | | 4x^2+6x+66=0 | | 3-3m+2m=-2 | | -19=-t+2t-8 | | 3+t-2t=-1 | | 10+7d+4d=98 | | -5x+3+2x=-33 | | 8+2x-7x=-7 | | -1+6b-7b=-7 | | -6k+3+k=8 | | -44=-7b+3b+4 | | 3m+8+7m=108 | | 8+6m+2m=-72 | | -5n+8+2n=17 | | (7y-8y)2+14= | | -94=-6x-2x+2 | | 10+7n+7n=150 | | 5+6a+3a=-4 | | 7+3k+3k=-5 |