What was the main ideology behind mercantilism? A. colonies existed to make a profit for the mother country.
B. colonies were used to house prisoners from the mother country.
C. colonies were established to do whatever they wanted.
D. colonies were set up to help with the overpopulated mother country.

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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

answer; a farmer who refuses to fight in his country's army;