If it's not what You are looking for type in the equation solver your own equation and let us solve it.
C in (-oo:+oo)
C/2 = 12/4 // - 12/4
C/2-(12/4) = 0
C/2-3 = 0
1/2*C-3 = 0 // + 3
1/2*C = 3 // : 1/2
C = 3/1/2
C = 6
C = 6
| c/9=7 | | 34x-12x-5=x-2x | | 3=24-3r | | 0.5(n+1)=0.25(3n-5) | | (x-8)(x+9)=10 | | 9=3+2h | | 0=15x^2+39x-18 | | 1.7u+18.3=2u | | 9x-4=(8+4x)+7 | | 27x-13y=0 | | 3(x+4)+4x=2-6 | | X-2(4x-2)=20 | | -8x+5=-6x+3 | | 2a-7-a=-9+3 | | 9b+2b-7b=728 | | 2x^2+110x-900=0 | | 1=z/5=9 | | X-8=7-2/3x | | 4.7+d=8.1 | | 3.15+.85x=7.4 | | MC=-10+Q | | 2(8P+7)=2(7-4P) | | 6-d=-2 | | -6x+8x=-16+4x | | x^2+8x+16y^2+7=0 | | 5-(-2+x)+x+9=22 | | 5-0.5y=2y | | 60h/55=235 | | -47-24X=-1+4(-5-6X) | | 7-d=3 | | 4(5d-2)-6d=5(2d+4) | | d+12=27 |