To solve: if x-2y=0 and -2x+y=2, then 3x-3y=

First equation is

Second equation is

subtract equation (2) from (1),

Distribute minus inside the paranthesis,

Now combine the like terms,

Thus the value of is

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.