If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
(3/7)*w+3/7 = (-5/7)*w+99/7 // - (-5/7)*w+99/7
(3/7)*w-((-5/7)*w)+3/7-(99/7) = 0
(3/7)*w+(5/7)*w+3/7-99/7 = 0
8/7*w-96/7 = 0 // + 96/7
8/7*w = 96/7 // : 8/7
w = 96/7/8/7
w = 12
w = 12
| -d+1/2=4-1/2d | | 4/5n+5/6=39/5+1/6n | | -a+2=6a+78/11 | | 8+m=7m+31/5 | | 1/3+5/6w=3w+14/3 | | k+2=6/7k+149/70 | | 2x+5/7=3x-17/84 | | 3x+4/9=-1/45+2/3x | | 16u^6+28u^4+12u^2+21= | | 2/3k-2/5=-11/15+k | | -1/4-4d=3d-235/44 | | X-4=-19 | | 2/3+3/5t=7t-278/15 | | -1/3b+4=-7b+232/3 | | -3/5t+4/7=7t-262/7 | | 7.20/6 | | -7/9-3n=6n-25/9 | | 3/7k-8=k-173/21 | | 4/7-6m=m-41/14 | | 3/5+4w=-1/5w-228/5 | | 4k-3/10=-273/10+k | | 3/8-7a=3a-477/8 | | 2/3b+3/5=-14/5-5b | | 2/5n+7=3n-4/5 | | -x+1/5=3x+191/55 | | -2/7x-5=-359/70-3/7x | | 8-1/3w=7w+68/3 | | 3b+3/4=6b-9/4 | | 3k-4/5=4k+16/5 | | t+10=-5/6t+251/24 | | 5b-2=7b-14 | | x-(-5.4)=41 |