Explain the role of the encomienda system and Christianity in Spanish exploration.

In the early 16th century, the Spanish crown set up the encomienda system in the Americas to divide up the American Indian labor force in order to aid the development of their mining ecomony. ... The encomendero provided the laborers protection from warring tribes, and teachings in the Catholic faith.

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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