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)
4-6*m = 2*m+84 // - 2*m+84
4-6*m-(2*m)-84 = 0
4-6*m-2*m-84 = 0
-8*m-80 = 0 // + 80
-8*m = 80 // : -8
m = 80/(-8)
m = -10
m = -10
| -5+6d=-6d+127 | | -k-6=3k+22 | | -7b+8=-2b-17 | | -3a+4=4a+39 | | 5a+8=-2+4a | | -6m-8=6+m | | y=-2/5-3 | | 3d+2=5d-22 | | 6x+4=94-3x | | a+5=6a+50 | | -8-2d=6d-16 | | -4+5n=6n-6 | | 5a+10=a+2 | | 4-3d=-2d+13 | | 7x-6x-1=6 | | -2k-3=-6+k | | -7t+1=7t-139 | | 3+3x=4x+9 | | 7-7a=7a-161 | | 6+2n=4n+28 | | m-9=36+6m | | -5m-1=-57+3m | | 0.0001x+0.09=1.1 | | -7m+8=5m-52 | | 6+k=3k+26 | | 9+6w=3w+9 | | 11x-112=4x-14 | | 1+5d=2d-5 | | 7x-154=2(1-3x) | | 10z+2z=12 | | -3x+10=3x+16 | | 3+m=5m-13 |