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*m-2 = -42 // + 42
42-4*m-2 = 0
40-4*m = 0 // - 40
-4*m = -40 // : -4
m = -40/(-4)
m = 10
m = 10
| 5k+10=-30 | | 10-6x=76 | | (7x+22)/2=9x+8 | | (7p+22)/2=9p+8 | | -21-4x=4x+18 | | -4(0)+5(0)-8+4=6(0)-4 | | 1-4a=-19 | | -3d-5=13 | | 3b+6=15 | | -2d+3=-19 | | 4b+4=32 | | 1+5b=-29 | | 4m+8=52 | | 158-6x=3+23 | | 3a+3=9 | | -3+4b=25 | | -7+2d=15 | | -5-2w=19 | | 5a-3=57 | | 7w-9=12 | | 3-7a=-46 | | -9-3n=-15 | | -3w+6=-30 | | -1-7x=-8 | | 3m-4=14 | | 6+2b=20 | | (2x-5)(2x-5)-4x-10x+3=0 | | 2+3m=38 | | 9(-5)+1=7(-5)-9 | | 7d-4=80 | | -4k-2=26 | | -4d-8=-48 |