1. 5/13t = -9
2. 6 = x + 2/3
3. 13 + w/y = -18
4. 17 = -13 - 8x
I'll do one; you try the others. If you get stuck, come on back and show where.
5/13 t = -9
multiply by 13/5 to cancel the 5/13:
t = -9(13/5)
t = -117/5
I suspect #3 has a typo