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)
3*k+1 = 28 // - 28
3*k-28+1 = 0
3*k-27 = 0 // + 27
3*k = 27 // : 3
k = 27/3
k = 9
k = 9
| 5/8+3/4b=41/8 | | -6/7t+10=722/77 | | m-4=-4 | | 9/10-2x=-11/10 | | -4/7x+2/9=-418/63 | | 1/2w+5=17/2 | | 4/7+1/3d=76/231 | | 45-2x=16x+19 | | 5/6k-8=-91/12 | | 1/2k+8=65/8 | | 3(4x-2)=2(2x+9) | | -1/2+5/6d=7 | | 4/5b-1/2=83/10 | | 1/2n-2/5=-27/5 | | 1/7x+2=16/7 | | 3+4/7x=113/35 | | 1-3/7m=53/56 | | -1/2d-1/5=-16/5 | | 10-3/5m=86/5 | | -6+4t=-42 | | -5/7m-4/9=-4/9 | | 5a-4=-54 | | (3x-4)(x-6)=(x-18)(2x+1) | | 8+4a=24 | | 5/6t-1/3=7/24 | | -5/6b-1=-8/3 | | 3a+2=-1 | | 9-2/5a=43/5 | | -1/5b+8=39/5 | | -7+3x=-13 | | 5x+6=3x+16 | | 3/4n-3/8=-21/8 |