If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
6/7-((2/3)*x) = -50/7 // + -50/7
6/7-((2/3)*x)-(-50/7) = 0
(-2/3)*x+6/7+50/7 = 0
8-2/3*x = 0 // - 8
-2/3*x = -8 // : -2/3
x = -8/(-2/3)
x = 12
x = 12
| -2/5+1/2x=8/5 | | 8x+5=3x-20 | | 3/5x+4/5=31/5 | | 4/5+4x=84/55 | | 3/8+1/3x=97/24 | | 2/3x+3/5=169/165 | | 2x+8=25/3 | | -3/4x+3/5=-42/5 | | 2/5x-7/9=73/45 | | 2x+3/5=-13/45 | | 1/6x-1/10=47/30 | | -7x+3/7=346/7 | | 3x-8/9=31/36 | | 3t+15-4= | | -6x+1/2=-1 | | 5/7x+1=10/7 | | -1/3x+6=7/3 | | 3/4x+1=-23/4 | | -3/4-5/6x=-109/12 | | 6+2x=47/6 | | -7+4/5x=-11/5 | | 7x-9/10=761/10 | | 4x+6/7=-274/7 | | 4/7x+8=96/7 | | -2/5x+7=39/5 | | 5/7x-2=-4/7 | | 2-3(a-5)=-10 | | 1/7x-3/4=-7/4 | | -1/7x-6=-37/7 | | 6x-5/8=143/40 | | 2/3x+7=35/3 | | -3/8-4x=95/88 |