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)
20*(X/4) = 20*(x/5-12) // - 20*(x/5-12)
20*(X/4)-(20*(x/5-12)) = 0
20*(X/4)-20*(x/5-12) = 0
5*X-20*(1/5*x-12) = 0
5*X-20*(1/5*x-12) = 0
5*X-4*x+240 = 0
5*X-4*x+240 = 0
5*X-4*x+240 = 0 // - 5*X+240
-4*x = -(5*X+240) // : -4
x = (-(5*X+240))/(-4)
x = (5*X+240)/4
x = (5*X+240)/4
| 2(y-3)+3y=39 | | 5/40=x/100 | | 54-3R=-18 | | 6ab/2ab= | | 4(a-7)+14=2(a-4) | | 0.4u+8=-0.2u+3 | | 1.386x=x+2 | | 20u+119.85=919.85 | | 5x+8x=15x-6 | | 6E-16=10E+38 | | (2x+3)=(x+5) | | -7(-3)+2(-9)=3 | | -2T+25=0 | | 90-4x=0.6x^2-12x+80 | | 0.4x-0.2(4-x)=2.5 | | 0.693x=x+1 | | -4(8n-1)=19+32n | | 1.386x=1+2 | | 6x-49=17 | | -7(8)+2(4)=3 | | 6x-4(2-x)=8 | | 4a-3b+5c=16 | | 27-17=2(x-1) | | 20x=ex+3 | | 30x-4+6x-10x-13= | | 2/x-6=7x | | 30-4+6x-10-13= | | -5+10y+10=14+13y-24 | | 15x+4=x+4 | | 6(45x-18)+34=7(7x+16)-10 | | N+-9=-24 | | -t^2+9t-8=0 |