How do the political parties help voters?

Well first, political parties are teams of activists, politicians, and voters, who all have the same goal of winning the control of the government. To try and do this, each party do essential things such as recruiting and nominating candidates, getting resources needed to run their campaigns, and pursuing their policy agenda so that it can appeal to voters.

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Explanation:

mining and farming towns developed

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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