If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( t )
t/3 <= 0
t/3 <= 0
t/3 <= 0
1/3*t+0 <= 0 // - 0
1/3*t <= 0 // : 1/3
t <= 0/1/3
t <= 0
t in (0:+oo)
t*ln(t/3) = 0
t = 0
ln(t/3) = 0
ln(t/3) = ln(e^0)
t/3 = e^0
t/3-e^0 = 0
1/3*t-1 = 0 // + 1
1/3*t = 1 // : 1/3
t = 1/1/3
t = 3
t*ln(t/3) = 0 <=> t = 0 or t*ln(t/3) = 0 <=> ln(t/3) = 0
t in { 0}
t = 3
| 5(x-4)+(2x-7)=0 | | 2f+3f=4g | | 6x+30=582 | | 3j+2j+k=5h | | 68+x=90 | | ac+by=d | | 7(x+2)=7x | | (-3u^2+u-6)+(7u^2+5u+2)= | | x-8(2)=-3 | | 1/4z=-3/4 | | -7(0.1x+0.50)-0.9=0.2 | | w/8-1.1=13.9 | | f(x)=sin(x)ln(8x) | | 4.5/13.5=x/17.4 | | 4/12m=-10/12 | | 2w^2-5-33= | | 3x-(9x+8)=13-6x | | 18x+2y=14 | | 6z^4(8z+10z^2)= | | -210+5x=-1470 | | 1/12y=4/12 | | (-5x+4)+-1(x-1)=0 | | 8x=8x+5 | | 7/2x-1/2-27/2 | | p-1/2=-3/4p-3/8 | | 7.4x-1.6=13.2 | | 6x+15=333 | | (5/9)*x-(1/3)=3 | | 82y=27y(3y+1) | | m+1.3=8.9 | | x-2-sqrt(x)=0 | | 5(4+x)=5(3x-1)-45 |