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)
-131/42 = (5/6)*d-((6/7)*d)-3 // - (5/6)*d-((6/7)*d)-3
(6/7)*d-((5/6)*d)-131/42+3 = 0
(-5/6)*d+(6/7)*d-131/42+3 = 0
1/42*d-5/42 = 0 // + 5/42
1/42*d = 5/42 // : 1/42
d = 5/42/1/42
d = 5
d = 5
| 47/7=4/7m+2/7m+5 | | x+6+7x=11 | | z^3+3i=0 | | -2/9+4x+1/2x=563/18 | | -53/11=-4m-4m+1 | | 6/7+4/5m+6m=-470/7 | | 21/4=6b+3b+3/4 | | 4/5d+3+d=228/55 | | -t-5/8+6t=25/24 | | -299/100=-3/5a-1/2a-2 | | 5+2(y-3)=4 | | 6x+3x=27 | | 6/7x+7-6x=73/7 | | 3141/35=7w+3/7w+3/5 | | -97/24=6k+1/2k+5/6 | | 1/3w+10+5/7w=674/63 | | m-10+6m=-8 | | 5/6n+1/2+5n=-191/3 | | 5/6m+10-2/3m=149/15 | | x^3+3i=0 | | 53/77=7b+2/7b+4 | | 3-4m-2/5m=149/35 | | 1/4b+10-1/2b=319/32 | | -1067/14=-4/7b-7b-1/2 | | 4/5d+1/3+5d=527/15 | | 3+x+2x=15/4 | | 6b+9/10+b=22/5 | | x^2+x-1=16x^2+9 | | -48/5=-2/5t-t+3 | | 6b+10+4b=60 | | 16/11=2k-1/3k+1 | | 5b+4/7+4/7b=160/7 |