!!!!SHOW WHY IT IS CORRECT PLEASEEE!!!!
\and please don't steal the points :(

Answer: Its correct because 3(2t+d) = 6t + 3d are equal.
Step-by-step explanation:
First we need to solve the equation
3( 2t+d ) = 6t + 3d //// Do some distributive property
6t + 3d = 6t + 3d //// Do you see it . . . They are equal to each other.
So its true.