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)
38 = 4*m-7*m+8 // - 4*m-7*m+8
38-(-7*m)-(4*m)-8 = 0
7*m-4*m-8+38 = 0
3*m+30 = 0 // - 30
3*m = -30 // : 3
m = -30/3
m = -10
m = -10
| x+6+2x=9 | | 4(5-3y)-2(4-y)+2=12 | | 2t-3+6t=-35 | | 5-5d+2d=-28 | | 8=3x+6x-1 | | 4x+5+4x=29 | | 2+5t-3t=10 | | -5d-1-5d=-51 | | 3+3t-5t=-15 | | 6d-4+5d=117 | | 2d+1+d=19 | | 8+7t+t=64 | | 7+6t-5t=-2 | | -3t+2+4t=-6 | | -2a+6+5a=27 | | 24=6d-3d-6 | | 5(2x+3)-5(2-x)=0 | | -3-2m+7m=17 | | 6n-8+2n=8 | | -5x+2+4x=-3 | | -4d+5+6d=23 | | 3b+9+5b=9 | | 1-6a+5a=-3 | | 3w+9+4w=93 | | 5t-3-6t=0 | | 0=m+5m+6 | | -3=2w+5w-10 | | 9+7w+3w=109 | | x+3+3x=-21 | | -18=-6w-2w-2 | | 6b+6+5b=127 | | 26=x+x+8 |