If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
3/8-((6/7)*t) = -411/56 // + -411/56
3/8-((6/7)*t)-(-411/56) = 0
(-6/7)*t+3/8+411/56 = 0
54/7-6/7*t = 0 // - 54/7
-6/7*t = -54/7 // : -6/7
t = -54/7/(-6/7)
t = 9
t = 9
| -1/7x+7/8=139/168 | | 2t+4/5=14/5 | | 8/9-5n=-37/9 | | -1/2x-3=-65/24 | | -8+2b=4 | | a+4=15/4 | | -1/7+3/5k=17/175 | | d+8=6 | | -2/5m+8=26/5 | | -2/3a+7/8=13/24 | | 2/3-4m=-46/21 | | 1+5/7k=-8/7 | | -7b+3/10=-61/30 | | -4/7d-8=-60/7 | | 2x^2-20x-10=0 | | 5-1/5x=29/5 | | 5+m=14 | | -5/9+7b=-68/9 | | 4/7b+10=46/7 | | -3/7+2/3a=-3/7 | | 8+6k=-16 | | 1/4b-1/3=-25/48 | | 2/5b+6=38/5 | | -7+3a=29 | | 2/3x-8=-26/3 | | 1+1/2x=23/18 | | 2-5d=13/9 | | 5b+1=5 | | 5w+3/4=23/4 | | 4t+5/8=165/8 | | 5d+1=19/4 | | 2/5-2n=-4/15 |