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)
-13 = 4*t+7*t-7 // - 4*t+7*t-7
7-(4*t)-(7*t)-13 = 0
7-4*t-7*t-13 = 0
-11*t-6 = 0 // + 6
-11*t = 6 // : -11
t = 6/(-11)
t = -6/11
t = -6/11
| -13=-5n+7n+1 | | -12=w-1 | | -12=t-1 | | -12=n-10 | | -12=5a-2a+9 | | -12=3b+6b+6 | | 3(3x-1)-2(x-6)=23 | | 5x+4y=121 | | -12=-4b+b-9 | | -12=-3n+n-6 | | -12=-2n-7n-3 | | -11=t-8 | | -11=m-10 | | -11=k-10 | | -11=6t-7t-8 | | -10=k+1 | | -10-x-6x=-146/9 | | -10-n+4n=-104/11 | | -10-b-b=-67/6 | | -10-7m=-17 | | -10-7k-k=-4 | | -10-7a=11 | | -10-6x=-13 | | -10-6d=-11/2 | | -10-3m=-131/11 | | -10-3/4d=-55/4 | | -10-2/5t=-148/15 | | -10+x=-39/4 | | -10+n=-16 | | -10+m=-116/11 | | -10+k=-9 | | -10+k=-18 |