Answer:
11) 
Divide both sides by 2:


12)
(
if you wanted the exact value.
13) 
Switch sides:

Rearrange:


14) 



15) 




16) 
Multiply both sides by 4:


17) 
if you wanted the exact value.
18) 
if you wanted the exact value.
Bonus Question:
Terrorist attacks took place against the United States in September 11 2001.
This is named "September 11 attacks" and you can search more about it online.
You'd do x+x, y+(-y), and 8+4. You'll get 2x+0=12.
X=6 and y=2
Answer:
1.7646383e+18
Step-by-step explanation:
mark me as brainliest pls :)
24 is what percent of 49? The answer to that is 48.98.