Question

t+10-4t=-11

Answer 1

Here you go
t + 10 - 4t = -11
10 - 3t = -11
-3t = -21
t = 7
Hope that helps :)

Answer 2

Where do you get 3t

Answer 3

Sorry what i meant was:
t + 10 - 4t = -11
10 - 4t = -11
-4t = -21
t = 7