Which of the following best describes President Nixon’s foreign policy toward China?

A. He relaxed tensions through détente.
B. He enforced diplomatic sanctions.
C. He established friendly relations.
D. He defended the U. S. in wartime.

U.S. President Richard Nixon's 1972 visit to the People's Republic of China was an important strategic and diplomatic overture that marked the culmination of the Nixon administration's resumption of harmonious relations between the United States and mainland China after years of diplomatic isolation.

Explanation:

So its B

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27