If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d in (-oo:+oo)
69 = 6*d+6*d-3 // - 6*d+6*d-3
3-(6*d)-(6*d)+69 = 0
3-6*d-6*d+69 = 0
72-12*d = 0 // - 72
-12*d = -72 // : -12
d = -72/(-12)
d = 6
d = 6
| 1+x+6x=85 | | 15=m-3m+3 | | 3+3a+4a=45 | | 3k-3+6k=-21 | | -57=4a+2a-3 | | -9=-7a+5a+7 | | 3+3m+7m=83 | | 88=6n+3n+7 | | 1+6x-3x=34 | | 2=2b+2b-2 | | 4m-8+6m=82 | | 1+3m+7m=-9 | | 4a+7+7a=106 | | 78=4n+3n-6 | | 101=5x+3x+5 | | -4+5a+5a=36 | | -18=3w+2w+7 | | 2k+6+7k=78 | | 85=3d+7d+5 | | 7d-9+3d=91 | | 2+x+4x=-58 | | -b+7-4b=-48 | | 6b+3+7b=16 | | -2d+7+d=4 | | -2w+10-3w=-45 | | 43=3a+3a+7 | | 3w-10+4w=-3 | | 65=7t+5t+5 | | 3k-10+6k=8 | | 6=3t+3t+6 | | 2w+5-6w=-27 | | 6-7b+3b=2 |