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)
(2/5)*x-8 = (2/7)*x-292/35 // - (2/7)*x-292/35
(2/5)*x-((2/7)*x)-(-292/35)-8 = 0
(2/5)*x+(-2/7)*x+292/35-8 = 0
4/35*x+12/35 = 0 // - 12/35
4/35*x = -12/35 // : 4/35
x = -12/35/4/35
x = -3
x = -3
| 1/7+d=-1/2d+191/14 | | 6t+4/5=14/5+4t | | -7n+3/8=2n-69/8 | | -1/3-5n=6n+98/3 | | 3b-7/10=-6b+443/10 | | -4/7b+8=-1/5b+3119/385 | | 3d+8/9=-136/9+7d | | 4+3m=-3m+76 | | 5m+1/3=-263/3-6m | | -9+2/7d=7d-975/77 | | 5/6+4d=2/3d+125/6 | | 6+7a=-5a+6/5 | | -1/4w+3=9/4-w | | 1/7d+8=824/105+1/3d | | -6-2/3m=m-20/3 | | 5/9+5x=5/7x+3005/63 | | 3w+3/4=w+1/4 | | 8-4n=6/7n+464/7 | | 3/5+5/7x=6/7x-34/35 | | 4/5+3b=-4/5b+24/11 | | 5/6k-7/10=182/15+2k | | -2/5d-1/3=-5d-1/3 | | 8-m=2/3m+44/3 | | 3+1/3w=-3/5w+31/15 | | 5m+1=-2/7m+414/7 | | x+1/2=9/2-1/3x | | 7w+1/4=-19/28+1/2w | | a-8=2a-2 | | -d+1/3=11/36-5/6d | | -9+6m=-5/7m+454/7 | | 2d-4=-29/6+7d | | -2/5-2x=1/7x-614/35 |