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)
3*m+7 = 40 // - 40
3*m-40+7 = 0
3*m-33 = 0 // + 33
3*m = 33 // : 3
m = 33/3
m = 11
m = 11
| 5-3w=26 | | 3d-2=19 | | -10-2d=-18 | | -6+4a=-34 | | 6t-6=-42 | | (3/(x+4))=(2/(x-5)) | | 3-4m=-37 | | -2/-7=13 | | 6n-7=23 | | -8-3t=-35 | | -7k+1=-55 | | 2k+3=13 | | -6-6n=60 | | 3-2a=-1 | | -5a-4=-49 | | 6k+1=-71 | | 5b+9=44 | | 1+4d=37 | | 4b+1=21 | | -6k+3=39 | | -2b-4=-16 | | 8-2w=-4 | | -1-5n=-41 | | 7t+7=84 | | 6b-2=58 | | 2k-8=-2 | | 6-4t=-2 | | P=6.1 | | -5-5n=-10 | | 4t+5=41 | | -2t-2=18 | | 4-7w=-17 |