-2(-9x+6y) what is the next step

What is the missing step in this proof ?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )