Answer:
72 yd
Step-by-step explanation:
12 x 3=36
6 x 6=36
36 + 36= 72
-8-n=-6n+12
+8. +8
-n=-6n+20
+6n +6n
5n=20
5. 5
n=4
-x - 9

You want to get x by itself.
First subtract 9 from both sides of the equation.
-x - 9

+9 +9
-x

Then divide -1 on both sides.
-x/-1

I'm pretty sure when you divide a negative number when solving inequalities, you switch the sign.
x
The answer is -18
9 · -2 = -<span>18
</span>