Answer: y = -9x - 9
First, you need to put the two equations into slope intercept form (y=mx+b.)
1) y= -9x + 9
2) y= -10x - 9
First take the slope of #1
m = -9x
Then take the y-intercept of #2
b = -9
Now, put it into an equation.
y = -9x - 9
669.949 should be your result hope it helps and ask me anything you didn’t understand!
For this case we have the following expression:

Rewriting the expression we have:

Grouping:

We draw common factor from each group:

Answer:

Looks complicated, sorry wish I could help