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-1 = 83 // - 83
7*k-83-1 = 0
7*k-84 = 0 // + 84
7*k = 84 // : 7
k = 84/7
k = 12
k = 12
| 2b-5=15 | | 4m+9=33 | | 5a-7=-2 | | 3n+9=39 | | 5t-4=26-t | | 4m-8=20 | | 3d+8=26 | | -3m+9=12 | | -4w-2=-6 | | -7-6x=-31 | | -5+4b=3 | | 3t-8=-8 | | -9+7w=5 | | 2+3k=2 | | 23z+18z+3+32=180 | | 4b+7=19 | | -4+3a=8 | | 1-5d=-54 | | 7t-1=-64 | | 4x+3-2y+5+2x+4y= | | 0.13y+0.06(y+7000)=1180 | | -10-5x=-20 | | (1/4)y+5=(1/8)y | | -5d-10=-70 | | 2+2d=-14 | | -5d-8=22 | | -7-5w=33 | | 5-4t=-39 | | 5(x+4)+9=-16 | | 2-9z-7-10z= | | 3x-12/3x=4x*x-9/4x*x-16x+15 | | -9-2a=9 |