Read the excerpt from liam’s blog. if it’s spring cleaning time at your house, consider giving me a call! my friends and i started washing windows three years ago. we supply all of our own equipment and leave your house sparkling clean. our service is guaranteed! the purpose of liam’s blog is to advertise his window washing service. entertain with stories about his job. persuade readers to use his cleaning products. teach readers about window cleaning safety.

The purpose of Laim's blog is: to advertise his window washing service

We can drive to conclusion by reviewing the sentences that Liam use.

This line:

. . . If it’s spring cleaning time at your house, please consider giving me a call . . .

Provide the readers with the information that Liam is currently open to receive any request for cleaning houses.

And this line:

. . . We supply all of our own equipment and leave your house sparkling clean. Our service is guaranteed! . . .

Is made to show the competitive advantage that Liam's service has over other options.

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

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.