Answer:
D
Step-by-step explanation:
Assuming the figure PQRS is a parallelogram, then opposite sides are congruent, that is
PQ = RS ← substitute in values
6x + 2 = 12 + x ( subtract x from both sides )
5x + 2 = 12 ( subtract 2 from both sides )
5x = 10 ( divide both sides by 5 )
x = 2 → D