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)
(3/5)*x+3 = 12 // - 12
(3/5)*x-12+3 = 0
3/5*x-9 = 0 // + 9
3/5*x = 9 // : 3/5
x = 9/3/5
x = 15
x = 15
| -9x+5=86 | | 3x+8/10=x/5 | | -9x+5+86 | | 209-11n=13x | | 1/5(3t-9)=(9/5t)-(t+9)/10 | | 9+m/4=-1 | | 5x^3=5x | | 3x-18-5x+10=-10 | | 13x=209-11n | | 15w^2/8x*4x^2/25w^3 | | x+2/2=11 | | 1/5(7t-8)=9/5t-t+8/10 | | 7x+2xy+9y-42=0 | | 6+5a=-39 | | 5+4c-15=-2 | | 2/3+3/4=71/12 | | x/8-4=5 | | -4(x+3)+6=6(x+2)+1 | | 2(2.5)x | | 17x^2=8 | | 45x^2+60x-20=0 | | x-fy=6v | | 100x=25 | | -2x-7/2=5/2 | | 100=5/2(b1+12) | | 10s+3=9s | | 7p-(3p+4)=2(2p-2)+10 | | 3p-2(6-3p)=5(p-3)-5 | | X-4/3=x+4/2 | | 10(v+3)-4v=3(2v+4)-20 | | 3/2(x+4)=5-1/3(4-x) | | 1/4(4) |