multiply all terms in the second equation by 2 to get the coefficient on the y variable to be -6.

Do you have a graph or a picture? It would be easier to explain
division problem
In a division problem, the number being divided into pieces is the dividend. The number by which the dividend is divided is called the divisor. And the answer to the division problem is the quotient.
-6g + 36 = 12
36 = 12 + 6g
24 = 6g
4 = g
g = 4
Answer: 7%
Step-by-step explanation:
Given: Initial jobs = 428.5 thousand
Average rate of declining of jobs from 2010 to 2020 = 3 thousand jobs per year
From 2010 to 2020 , there are 10 years.
Total jobs declines till 2020 = 10 x (3 thousand)
= 30 thousand (Change in jobs)
Now, utilities percent change for 2010 to 2020 : 

Utilities percent change for 2010 to 2020 = 7 %