Quick Review
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CC:S-2
Countries often set up trade
to restrict trade. One example is a
- which is a fox on imports. A second example is a
me quantity of an item that is brought into a country. A third example is a
which
en proribus dl trode with another country. han effort to increase trade in North America, the US,
Coode, and Vetico signed an agreement called
- which stands for
-- This agreement
created a
_trode zone in North America

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during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.

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