If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
2*a-(6/12) = 0
2*a-1/2 = 0
2*a-1/2 = 0 // + 1/2
2*a = 1/2 // : 2
a = 1/2/2
a = 1/4
a = 1/4
| 12t^2=45+51t | | 2X-35/x=5/3 | | 5w^2+29w+36=0 | | S^2=-12-8s | | G+3P-0.33S=10 | | 3G+3P-S=30 | | 5x+yn=6 | | 1/6180m | | x^2+7x+6x+30=12x | | 2G+P+S=20 | | px^2+px+2q=2+10x | | y=-7x^2+15x-8 | | x^4=0.625 | | 10log(3L)=30 | | X*2+2x=9 | | 20x^2+13x=0 | | 9x/2-x=x/10-4/5 | | (y-sqrtx^2+y^2)dx-xdy=0 | | 30×1/6 | | y=7-x/4 | | 4/5x-65/100x=21 | | y=-3x^2+14x+5 | | 3r-10=59 | | 2x^3+3=19 | | x^2-17x=60 | | 5x-14+x+32+3x+2=180 | | 30x^2+160x+2=0 | | (3x)(92x)=13 | | 30x^2+32x+2=0 | | 7y+3=5y-3 | | 3r(r-6)+2=4(r+2)-21 | | -20=4f |