If it's not what You are looking for type in the equation solver your own equation and let us solve it.
l in (-oo:+oo)
((14*l)/2)*l-12 = 0
7*l^2 = 12 // : 7
l^2 = 12/7
l^2 = 12/7 // ^ 1/2
abs(l) = (12/7)^(1/2)
l = (12/7)^(1/2) or l = -(12/7)^(1/2)
l in { (12/7)^(1/2), -(12/7)^(1/2) }
| 3y+11=8x | | (9s+9)+(-5s-9)= | | x^2-7mx=0 | | (8k-4)+(-4)= | | Y^6+0.125z^6= | | 5x-11=5x+1 | | (q-4)+(-2q-6)= | | (2b+9)+(9b+5)= | | (-7c-9)+(7c+7)= | | 5x+y-1=0 | | N+N+N=30 | | (x-4)/(y-4)=1/16 | | 7/x=14 | | 16(x-4)=y-4 | | N+11=80 | | 11/12-5/8 | | ax+7=bx+13 | | 16y+8y^2=0 | | -3m+9p=5 | | 4m-2p=0 | | -2b+d=1 | | 8x-6+60+42=180 | | X+5=-2x+14 | | 15-2n=n+2 | | -7z+14=56 | | 3x-6/6=-4 | | .429n=21 | | h^2+6=16 | | 3/7n=21 | | 3x/10-x=3/2-x/5 | | 7n-n=48 | | 5(f-2)=35 |