What did these four states have in common at the start of the Civil War: Delaware, Missouri, Kentucky, and Maryland?

Delaware, Kentucky, Missouri, and Maryland were all slave states that didn't secede from the Union.

Kentucky, Maryland, Delaware, and Missouri were all border states, meaning that they were slave states that didn't secede from the Union like the other slave states did.

(They also were all slave states and start with a consonant)

- Anonymous_hello

mexico south america

explanation:

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13