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)
3-(7*d) = (5/7)*d-(57/14) // - (5/7)*d-(57/14)
57/14-(7*d)-((5/7)*d)+3 = 0
(-5/7)*d-7*d+57/14+3 = 0
99/14-54/7*d = 0 // - 99/14
-54/7*d = -99/14 // : -54/7
d = -99/14/(-54/7)
d = 11/12
d = 11/12
| 9+2/3x=6x+35/3 | | -3/7-m=-2/5m-81/140 | | 1/4+1/7x=x-13/140 | | 5-4/7k=k+59/14 | | -3/7a+9=85/7-1/7a | | -7-2/3t=-5/7t-493/70 | | 3+3/7a=3a-123/7 | | -2/3b+2/5=382/5-7b | | 5b+6=4b+8 | | 6x-2=6x+2(x-6) | | 2w+1=23/11-w | | -7/8+k=-k-87/8 | | 6b+4/5=-517/10+3/4b | | -6w-2/5=-3/4w-127/55 | | 1/2m-1/2=m-1/22 | | 5/7t-5=3t-321/77 | | -5/6w+1/8=-w-37/24 | | 3+6/7d=6d+39/7 | | 2w+3=4w+7/4 | | 2/9+5/7x=3x-38/21 | | 3/5+7m=-2/3m-733/120 | | 2/7n+3/7=n-13/63 | | 6-6n=6n-2 | | -5/6n+3/4=n-41/4 | | 1/4w+9/10=-2/3w+79/60 | | -1/9+7d=1/3d+109/99 | | 1/4x-3=-401/126-4/7x | | 7/10-1/5k=k+83/50 | | -2/5w+7=143/5+5w | | 1+4t=-4/7t+33 | | 6/7x+1=295/231-2/3x | | 4k-1/7=-3-2/7k |