If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
13-((1/3)*u) = 2 // - 2
13-((1/3)*u)-2 = 0
(-1/3)*u-2+13 = 0
11-1/3*u = 0 // - 11
-1/3*u = -11 // : -1/3
u = -11/(-1/3)
u = 33
u = 33
| 10x+8=10x-12 | | 2x+92= | | 3x+11=6x | | 180-139.2= | | -10(4x+8)=80 | | 4b^2=17+b | | (18x-3)/3 | | 18x-3/3 | | 6x+10=4x+40 | | 38+38+38= | | n-5/2=-5 | | W-17/w^2-2w-3 | | (1/3)w-5=(-7/4)w-(1/3) | | -0.1(40)+0.4x=0.2(40+x) | | 68+(2x+18)=90 | | -400=-50x+50 | | (2x^2+9x-5)+(2x^2+3x+11)-(4x^2-17)= | | 3y-5/5=6y-5/11 | | 74+(4x+12)=90 | | -12x+8=-52 | | 1+2k=k-9 | | 35mn^4+14m^6n^3=0 | | 2r^2-72=-10r | | p/^-4=12 | | 6x+1y=180 | | f(x)=0.25 | | a^2=14 | | 42-(2x+9)=2(x+4)+x | | x/3×2=10 | | -5*55-5*44-5*12-5*12+96=-5*12+99-178-5*66-30 | | 10x^2=18 | | 2y-6-4y+5y-8+3y=22 |