If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
-12 = 5*x-3*x-8 // - 5*x-3*x-8
8-(-3*x)-(5*x)-12 = 0
3*x-5*x-12+8 = 0
-2*x-4 = 0 // + 4
-2*x = 4 // : -2
x = 4/(-2)
x = -2
x = -2
| 9+k-2k=-1 | | 3b-1+7b=29 | | 2*1/5+1=7 | | -7+5t+7t=-67 | | 10+5n-6n=-2 | | (x-8)(x-10)=-19x+122 | | 5k-6+6k=104 | | 1-7m+2m=56 | | 9+5m+m=15 | | -6+2b-3b=-4 | | 10+4b-2b=18 | | -7+6d-d=-67 | | 2+3k-4k=-3 | | 5x-4=16+3x | | 12=5a-6a+2 | | -5b-1+7b=19 | | 8+6x+7x=-135 | | x+6+x=6 | | 62=3a+6a-1 | | 5t-6+2t=-34 | | 3w+6+w=30 | | f(x)=0.5x^3-3x^2+4.5x+2 | | 3w+1-w=3 | | 5x-6+5x=-96 | | -14=-3k+7k-10 | | -125=7m+4m+7 | | -6m+7-6m=55 | | -2m+1+m=-4 | | d+5-7d=-67 | | -2n+3-5n=10 | | -4-4t+2t=-14 | | 8-6x+4x=10 |