Answer:
A. 8
Step-by-step explanation:
In a parallelogram, by definition, opposite sides are equal. This means that in this case, x+2 = 10.
From here we can subtract 2 from both sides to get x+2-2 = 10-2, however +2-2 = 0, which is why x = 10-2 or simply 8, which corresponds to option A.
