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)
(x-2)/3+(x+5)/4 = (2*x-1)/6-((x+12)/8) // - (2*x-1)/6-((x+12)/8)
(x-2)/3+(x+5)/4-((2*x-1)/6)+(x+12)/8 = 0
(x-2)/3+(x+5)/4+(-1*(2*x-1))/6+(x+12)/8 = 0
(4*6*8*(x-2))/(3*4*6*8)+(3*6*8*(x+5))/(3*4*6*8)+(-1*3*4*8*(2*x-1))/(3*4*6*8)+(3*4*6*(x+12))/(3*4*6*8) = 0
4*6*8*(x-2)+3*6*8*(x+5)-1*3*4*8*(2*x-1)+3*4*6*(x+12) = 0
336*x-192*x+72*x+96+336+864 = 0
144*x+72*x+432+864 = 0
216*x+1296 = 0
(216*x+1296)/(3*4*6*8) = 0
(216*x+1296)/(3*4*6*8) = 0 // * 3*4*6*8
216*x+1296 = 0
216*x+1296 = 0 // - 1296
216*x = -1296 // : 216
x = -1296/216
x = -6
x = -6
| 2x-1+2x-1=68cm | | x*x+b=a | | 5/8x-7/15 | | a*x+2=z | | 5/x+3/(2x)=-4/3+5/(2x) | | 5/x+3/2x=4/3+5/2x | | 4x+144=444 | | x^3+5x^2+2x-8=1 | | h(t)=-16t^2+12t+40 | | h(t)=-16x^2+12x+40 | | 76-5x=4x+24 | | x^3+8x^2+15x^1=0 | | 14x+14=-42-10x | | -137-8x=44-15x | | 637.50/x | | 6x+73=12x+17 | | 12x-4=10+2 | | 5a(3-a)+6a^2-13a=2a+1a^2 | | 46-5x=4x+18 | | X^2-xy-y^2=0 | | 4x+14=82-8x | | 53-3x=8x-20 | | (m-3)(m-3)=64 | | m^2-9-64=0 | | 3x-34=2x-5 | | 4/x+1=2x/x+6 | | 195-3x=33x+23 | | 33=6c-3 | | -86-7x=8x+149 | | rd=309d | | 30f=f^2 | | 4(-1x-3)=-52 |