Answer:
<h2> The first</h2>
Step-by-step explanation:

That means every x wich is greater than 7
Multiply all terms by 12/1 to get rid of fractions.
8x+2= -9x+12
Add 9x to both sides
17x+2=12
Subtract 2 from both sides
17x=10
Divide both sides by 17
x=10/17
Final answer: x=10/17
Check the picture below
notice the length of the base, and of the height/altitude