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)
3*(x/5-6) = 12 // - 12
3*(x/5-6)-12 = 0
3*(1/5*x-6)-12 = 0
3*(1/5*x-6)-12 = 0
3/5*x-30 = 0
3/5*x-30 = 0
3/5*x-30 = 0 // + 30
3/5*x = 30 // : 3/5
x = 30/3/5
x = 50
x = 50
| 9=9-2(2x-6) | | 4c^3+24c^2-108c=0 | | A+7=14 | | x^2+x^2+4x+4=576 | | 6x+11=7x | | -54=-(1+3x)+4(-2x-5) | | 2x^3+x-35=0 | | 150.00x+1000.00=0 | | 3.5d+4.75=1+4.75d | | 550=10n-(150-3n) | | 8f^2+8f+2=0 | | 3y-235=y-5 | | 2h^2+4h+2=0 | | 0=r^2-240.0111 | | 5(5x+4)=3(9x-2) | | 150.00x+1000.00=6 | | 7+v=-6 | | W^2-36=-36 | | 9v^2+9v=0 | | -10|n/10=-6 | | 6y=27-3y | | 4x+23=9x+8 | | 8-7n-2n=1-7n-n | | 13.6900004=r^2 | | 6x+8x=46 | | 12x-15=3x+12 | | (y^2-4)(8y^2-9y+9)= | | 4+2x-x=x+4 | | 4y-5x-8=0 | | 5t+10=8t-2 | | 17x+13=540 | | t*.57=670000 |