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-((1/2)*x) = 20 // - 20
12-((1/2)*x)-20 = 0
(-1/2)*x-20+12 = 0
-1/2*x-8 = 0 // + 8
-1/2*x = 8 // : -1/2
x = 8/(-1/2)
x = -16
x = -16
| 3d^2+d-2=0 | | -2(-9+5x)=-72 | | 5x-1=-5x-11 | | -3y=75 | | -7n^2-8n-9=-8n^2 | | -6x+5=3x-22 | | 20a^2+30ac= | | 10-2x+4x=32 | | G^2=13-12g | | -3+5x-7x=-5 | | 2x+10=2x+2 | | -9+5x+6x=-97 | | 5x+1+5=9 | | 12+4p= | | 5P+4P+8P= | | x2/2-3/4=71/4 | | Y-8=45 | | 6w+10x= | | 6x-14=3x+1 | | 9m^2-12mp= | | .04y=2.4+.1y | | 24+5x=y | | 32+4x=r | | 3/a=b/x | | -(6)5/3 | | 2ax+b=3b-ax | | x^4-3x^3-2x-1=0 | | 3x+2y-(x+1)+5(2y-1)= | | (2k+5)(3k+8)=0 | | 14x+7=15x | | X-5=11-2x | | (2x-1)*0.3-5/(4x-2)*0,6 |