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)
12-8 = x/5 // - x/5
12-(x/5)-8 = 0
4-1/5*x = 0 // - 4
-1/5*x = -4 // : -1/5
x = -4/(-1/5)
x = 20
x = 20
| K^2-5k+14=0 | | 7x^2-8x=-6 | | 17+8x=-143 | | (x+5)(x+3)-2=(x-3)(x+1)+7 | | 29x-30x=5-6 | | 2/3x^2=54 | | 2m^2+8m+7=0 | | .8=180/x | | -11x=1 | | x^-2y^-3z^4/m^2n^7= | | (3ab^2+2ab+2b)+(5a^2-3ab+9)= | | -8y(y-5)=7y-8 | | 18-a=8b | | 6+6q=7+5q | | 3x^2-21=12x | | 3-13=-2z | | -9y=180 | | 4x/45=8/9 | | 24=11y-5y | | 2x+(-3)(x+2)=(-1)x+(-5) | | 28x-x^2=56 | | -3n-9-8n=34 | | 2y^2=6x | | 6w-19w=65 | | v=3.14(36)(15) | | -16t^2+141t+58=0 | | 25=-6(9y+3) | | 0.0279*x=79 | | y-2=1.25x | | 24/9=x/15 | | -34=-8k+4k | | (x+30)*5=365 |