Answer:
t = -3
Step-by-step explanation:
15 - 6t = -11t
ADD 6t TO BOTH SIDES
15 = -5t
DIVIDE -5 TO BOTH SIDES
t = -3
Do you see how I got t = -3? Do you fully understand it, so if you get another question like this, you won't need help? I hope this helps! :)