Answer:
lkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
Step-by-step explanation:
-7 because when it’s +(-) it’s always the same as the outside sign
-4 same thing explained above
-4
hope this helps
Answer:

Step-by-step explanation:

The sum of the interior angles of a triangle is 180 degrees
2x-9+3x+x+3=180
6x-6=180
6x=186
x=31
A=2(31)-9
A=62-9
A=53