Abc under a dilation whose center is P and scale factor 3/2 (GEOMETRY)

You haven't shared the answer choices.

Let's rewrite that first x term:  {4x, (1/2)x, 2y, 4, x, 3x), also leaving more space between the answer choices.

I see four x-terms in  { 4x, (1/2)x, 2y, 4, x, 3x } .  The like terms are {4x, (1/2)x, x, 3x }.  There are no other groups of like terms.