Answer:
D.2
Step-by-step explanation:
you need to multiply the sides of B by 2 to get the sides of A.
3 times 2= 6
6 times 2=12
4 times 2=8
D. 2
45 + x = 2x + 15
45 + 30 = (2 × 30) + 15
75 = 60 + 15
75 = 75