If it's not what You are looking for type in the equation solver your own equation and let us solve it.
y in (-oo:+oo)
(1/5)*(5*y+20)-6 = (-1/6)*(12*y-42) // - (-1/6)*(12*y-42)
(1/5)*(5*y+20)-((-1/6)*(12*y-42))-6 = 0
(1/5)*(5*y+20)+(1/6)*(12*y-42)-6 = 0
1/5*(5*y+20)+1/6*(12*y-42)-6 = 0
1/5*(5*y+20)+1/6*(12*y-42)-6 = 0
3*y-6-3 = 0
3*y-9 = 0
3*y-9 = 0
3*y-9 = 0 // + 9
3*y = 9 // : 3
y = 9/3
y = 3
y = 3
| 6,5/6/7/10 | | x(3-5)+32=7 | | 4xy-6yz= | | 1/6(x-15)x+20 | | 7/2*55/42*12/5 | | 4xy-6y^2= | | -2(y-7)= | | 15x+8=40 | | 5x^2-24x+7=2x^2-4x-5 | | 9y^2-y+8=0 | | 3/11*11/29 | | (2x-7)/x-5=0 | | 6X-(2X)-12=48 | | 6x-(2x-12)=48 | | x^4-13x^2+35=0 | | 25x-8=40 | | 5ln(3x+8)=4 | | 5/6*16*3/4 | | 8y+12=2y-8 | | -10+z=2 | | 74+n=38n | | 6(-24x+4)=96 | | as^2+3as+2a+bs^2-2bs+cs-2c=0 | | 4/y+6/y=2 | | 5*(2-x)=15 | | 0.5x+2y=-7 | | -(5y+4)-(-4y-5)=-1 | | -91=-6(-1+4n)-1 | | -9/8*-7/5 | | 1/q+1/s=1/g | | 2(z-21)=26-3(z-4) | | 31/2+21/2+4 |