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)
5-t = 7 // - 7
5-t-7 = 0
-t-2 = 0 // + 2
-t = 2 // * -1
t = -2
t = -2
| X^2+y^2-10y+4=0 | | 3(x+2+1)=2(x+2-3) | | 4n-1/5=19/5 | | 6+4m=42 | | x-5=7x+4 | | -1/4t-4=-17/4 | | 3/4+4/5k=3/20 | | 10-5/7m=55/7 | | 5+4/7m=37/7 | | -1/7b+5=33/7 | | 27=9x/2 | | d-9=-4 | | 27=.25x(6+3) | | 6a-4=26 | | -t+4/5=29/5 | | -4a=-5 | | 4/5n+4/5=28/5 | | 4n-3/7=-99/35 | | 5w+3/8=109/24 | | 9-4k=5 | | 3/5w+5/9=-299/45 | | 2/7k-1=-3/7 | | 1+4w=17 | | -5f=24-f | | 7w+1/6=253/6 | | 3b+2=16/5 | | w-2=-5/3 | | 2/3m-1/2=5/6 | | -4/9+5/7n=-523/63 | | 1+7m=9/2 | | 3w-1=-16 | | 1/4+2/7b=87/28 |