5. The policy of massive retaliation allowed President Dwight D. Eisenhower to A. prevent an arms race with the Soviets.
B. significantly reduce military spending.
C. vastly expand the scale of the Cold War.
D. focus on negotiations with the Soviets.​

B - significantly reduce military spending

Explanation:

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explanation:

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