If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
(1/2)*m-((6/7)*m)+1/5 = 31/280 // - 31/280
(1/2)*m-((6/7)*m)+1/5-(31/280) = 0
(-6/7)*m+(1/2)*m+1/5-31/280 = 0
5/56-5/14*m = 0 // - 5/56
-5/14*m = -5/56 // : -5/14
m = -5/56/(-5/14)
m = 1/4
m = 1/4
| 1/3n+10+n=2 | | -22/3=7k+2/3k+1/3 | | -1/7+6d+2/3d=-283/21 | | 1/7w+1+w=47/7 | | 202/35=2x-5/7x+5 | | -1/4x+4+7x=98/11 | | 1-3/7b+2b=13/7 | | -6w+9/10+2w=9/10 | | -29/55=3d-2d-4/5 | | 1/6m-3/10-3/5m=-1/90 | | 10+1/3t+2/5t=1577/150 | | 2/3m+1/2+1/3m=7/6 | | 2/3t+4+5/6t=17/4 | | 7k-3+k=-91 | | 1/6+1/5d+4d=1139/30 | | 1-4/7x+4x=25/7 | | 3n-3+2/5n=-107/30 | | (x-5)(4x+4)=3x(x-3)+10 | | 8+2d+2/5d=88/5 | | -8=3t-4/5t-6 | | 23/36=-3a+2a+8/9 | | 25=-k+5k+5 | | 494/63=-4/5m-6/7m-4/9 | | b+1+1/2b=1 | | 5t+1/8-3/4t=143/56 | | 3d+1+3d=-11/3 | | 4=-3b+4b-4 | | 5-3b-b=33 | | -314/33=4/5x+1/3x-9 | | -146/7=-2d+7d-6/7 | | 2/7+5/7t+2/7t=29/28 | | 543/10=-4a-5a+3/10 |