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)
5*m-3*m-7 = 9 // - 9
5*m-3*m-9-7 = 0
2*m-16 = 0 // + 16
2*m = 16 // : 2
m = 16/2
m = 8
m = 8
| 86=7b+5b-10 | | w+8-4w=26 | | 10+6x+5x=109 | | -2w+10-3w=10 | | -6x-8+x=-28 | | 3b+3-2b=-6 | | -5d+6-3d=-58 | | 9-b+6b=44 | | 7=-w+4w+7 | | -30=-7w+2w-10 | | 54=5x+x+6 | | 2+4d-5d=1 | | -11=-3w+2w-4 | | 1+5d-6d=-2 | | -7+t+5t=-73 | | 3k-1-4k=1 | | -5d+9+4d=0 | | 8+b+2b=20 | | 8-7a-2a=-46 | | 9=-6a+a-1 | | -6t-4-2t=-20 | | 12=4m-m+6 | | -2t+10+5t=28 | | 87=3m+6m-3 | | 2+7b+4b=-31 | | 15=-4m+6m+5 | | t+10-4t=-5 | | 6t+3-2t=51 | | 7w+6+5w=-90 | | 7b+1+6b=1 | | -4a+6-4a=-66 | | 3(h+8)=21 |