14-3 (5t-12) = 1 - (20t+1)

How am I supposed to do this?

Expand by multiplying out:

14-15t + 36 = 1 - 20t - 1,

Because of the minus before the bracket, it changes the sign inside the bracket

-15t + 20t = 1-1-14-36 Rearranging the ts on one side and the numbers on other

side.

5t = - 50 Divide both sides by 5.

t = - 50/5

t = - 10.