Answer:

The slope is negative.
General Formulas and Concepts:
- Order of Operations: BPEMDAS
- Slope Formula:

Step-by-step explanation:
<u>Step 1: Define</u>
Point (-5, 19)
Point (-1, 7)
<u>Step 2: Find slope </u><em><u>m</u></em>
- Substitute:

- Simplify:

- Subtract/Add:

- Divide:

Add 9 to both sides
x-9=0
x-9+9 = 0+9
x = 9
Answer:
x=-19/2
Step-by-step explanation:
3(x+6)+6x+9=7x+8
3x+18+6x+9=7x+8
9x+27=7x+8
9x+27-7x=8
2x+27=8
2x=8-27
2x=-19
x=-19/2