If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
15 = t+9 // - t+9
15-t-9 = 0
6-t = 0 // - 6
-t = -6 // * -1
t = 6
t = 6
| 10+v/3=16 | | w-8=-14 | | 9+k=0 | | t+3=14 | | 8+m=16 | | 10/4=15/6 | | N/9-8=-6 | | (150/100)+(x/32) | | 10+n=18 | | -6=b-1 | | -5+w=1 | | d+5=12 | | 8=a+10 | | -6+k=-4 | | 2=n-7 | | 6=k+5 | | b+1=-10 | | (x+2)/2=4(-x+6) | | -5/3+1/3=4/3t+4/3t | | f(x)=x^2+18x+77 | | 4x^2-16x=I | | 163.28*1/3 | | 7+k=8 | | -2=t+8 | | -3a=6 | | a/-6=4 | | b+5=0 | | 6(xz)=(6x)z | | 6.4x-5+x-1.9= | | 3y^4+9y^3-6y^2/3y | | 4/3x+2=6 | | t+7=16 |