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)
-78 = 6*d+6*d+6 // - 6*d+6*d+6
-(6*d)-(6*d)-78-6 = 0
-6*d-6*d-78-6 = 0
-12*d-84 = 0 // + 84
-12*d = 84 // : -12
d = 84/(-12)
d = -7
d = -7
| -4x-7+5x=-17 | | -1-6x-5x=-1 | | 2x+3/4+x-1/3=3x/2-x+4/6 | | 6+5t+2t=6 | | 8+2x+7x=-10 | | 9=-5x+7x+3 | | 3m+5+m=-7 | | -95=7m+7m+3 | | -4x+8+6x=18 | | 9+n-3n=31 | | -7d+8-2d=-28 | | -6b-2+4b=10 | | 58=-5d-d-8 | | -38=4a+3a-3 | | 5+3m+5m=77 | | -7a-6-7a=-34 | | 1-d+4d=-14 | | 3k+10+k=-10 | | -7k-3+k=-63 | | 7n+3+6n=120 | | 5x+1+7x=-11 | | 2k+3+5k=17 | | 3t+8+t=16 | | 3x-2-7x=26 | | 5=-2n-2n+9 | | 36=-n+5n+4 | | 10-6w-7w=-42 | | 98=5a+3a+2 | | -m-5+5m=23 | | -1=-a+2a-3 | | -22=4b-6b-2 | | 4a+8+6a=8 |