If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
8-(2*a) = 16 // - 16
8-(2*a)-16 = 0
8-2*a-16 = 0
-2*a-8 = 0 // + 8
-2*a = 8 // : -2
a = 8/(-2)
a = -4
a = -4
| -6b+9=57 | | -6w+8=38 | | y+4+3(y+2)= | | 7x-9=-9 | | 4k+7=51 | | -9+2t=-33 | | 5w-8=-28 | | -2n-1=-25 | | 5a-10=40 | | 5d+1=-14 | | -4w-8=32 | | 5k+9=-51 | | 5k-2=-52 | | -10+5k=40 | | -7x+2=-61 | | -2-7d=33 | | 1-6x=-11 | | 5k+8=23 | | -5m-5=-30 | | -3n-7=-40 | | -4+3t=-4 | | 8-2a=-6 | | 6+5b=-54 | | -6t+6=54 | | -4+7t=38 | | -8+3k=-14 | | -3+7x=25 | | -7m+6=48 | | 4a+10=30 | | 3a-10=23 | | 4m-1=35 | | -3+2a=-7 |