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)
6-2*a = 4*a+72 // - 4*a+72
6-2*a-(4*a)-72 = 0
6-2*a-4*a-72 = 0
-6*a-66 = 0 // + 66
-6*a = 66 // : -6
a = 66/(-6)
a = -11
a = -11
| 5k+8=-k-10 | | 2x+3=5x+27 | | -d+2=-8-3d | | -3x+3=-3+3x | | 9+7d=2d+49 | | 5/8+3/4x=1/16 | | 10+4x=6x-12 | | -4d+8=6d-12 | | 6+4x=6x-12 | | -1-5a=5a-21 | | -3x+1=4x-13 | | 6w+10=7w+5 | | 6x+1=64-3x | | -4m-1=5m+62 | | 3a-4=5a-14 | | b+5=26+4b | | 5d+7=-2d+35 | | 3w+1=-47-5w | | 3b+9=-b+21 | | -6k+9=-123+6k | | 7d+10=5d-14 | | -5a+2=4-6a | | -n+1=6n-55 | | 4t+7=19+3t | | n-10=30+6n | | k+7=4k-8 | | 7b-8=4b-26 | | 7k+9=-2k+90 | | -2x+7=25-5x | | 2x+9=-7+4x | | k-9=5k-25 | | 8-3x=3x-58 |