Which confederate military leader actually opposed slavery and secession and turned down an offer to command union forces?

Robert E. Lee  is the correct answer to that question because

Robert E. Lee was the confederate military leader who actually opposed slavery and secession and turned down an off to command union forced

c, because the american revolution was from 1765 to 1783.

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