The art of governing is to keep its affairs before the mind without weariness, and to practice them with undeviating consistency means?

The correct answer is, the meaning of the quote is that the the exercise of govern a city or a country is to maintain the public issues of the people at the utmost importance, despite of any ither circumstance, distraction or tiredness. And doing it on a consistent basis because is what good government does in any situation.  

The quote “The art of governing is to keep its affairs before the mind without weariness, and to practice them with undeviating consitency” is included in the book “The Analects”, attributed to Confucius, written by Lao-Tse. In chapter 12, is when Yen Yuan is asking the Master about these important political issues.

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

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