The answer is D, Place of publication.
Paris, and the meaning behind this is to show that they both honor and respect each other. That their love will kill the pity they feel. Their love will last forever.
Start of by writing 7x+1=50. Subtract 1 from both sides. You will get 50-1=49. Then you have 7x=49. Divide 7 on both sides. 7x/7. 49/7=7. X=7. Therefore x=7. Check your answer by plugging 7 into x. 7(7)=49+1=50. The answer checks out!