Answers A. and B. Are correct
2.8 I got that same on on khan academy it’s 2.8 trust me
Answer: x=2
Step-by-step explanation:
Answer:
The solution is 
Step-by-step explanation:
You are given the system of three equations:

Multiply the first equation by 4, the second equation by 3 and subtract them. Then multiply the third equation by 2 and subtract it from the second equation:

So,

Multiply the third equation by 23 and subtract it from the second equation:

Hence,

Substitute it into the second equation:

Substitute them into the first equation:

The solution is 
The top left shows a linear function