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)
13-((1/3)*x) = 9 // - 9
13-((1/3)*x)-9 = 0
(-1/3)*x-9+13 = 0
4-1/3*x = 0 // - 4
-1/3*x = -4 // : -1/3
x = -4/(-1/3)
x = 12
x = 12
| 45=3n*5n | | 6/42*21/42 | | b*3.2+7.42=9.81 | | 13-1/3 | | 7-3n-1=4-4n | | 16/42*21/42 | | 2x+12+38=180 | | 2y-6(-4)=0 | | -20+2x=-(x-6)-5 | | 8x^2-7x+4=3x+2 | | 5x-9y=30fory | | 20p+14q+p-5q-3p= | | 3*5*2*3*5*2*2*3*5*3*5*2= | | x+7x=40 | | 7x=(-3) | | -8+k=4(k-2) | | 0=3w^2+w-234 | | 6(4-2)=22 | | 10m+2n-6m+7n= | | 3x+15+40=180 | | 4(x-3)+2x=36-2x | | 2x+(1/x) | | 4-(3y+7)+8y=2y+3(8-y) | | -8/5x=40.8 | | g(x)=2x^2-3x-2 | | a=1/2(22*34) | | 6-5(1+2p)=19-7p | | -7y+6=41g-2 | | 9x+5=6-3x | | 20y+4=10 | | 4a+19=27 | | 1/4m+3/4m=-5 |