Answer:
2x
Step-by-step explanation:
7x= 7*x
5x=5*x
Subtract.
7-5=2
2*x=2x
So 2x is the answer.
Answer:
Please don't do zooms without providing your explanation for doing them.
Step-by-step explanation:
You need to present yourself as someone who isn't creepy or anything. This is why you should provide an explanation in case you just want to talk.
Answer:
I marked it in the picture below
Step-by-step explanation:
hope this helps
Answer:
![\displaystyle [-2, 7]](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5B-2%2C%207%5D)
Step-by-step explanation:
You want to eradicate one pair of variables so they are set to zero. It does not matter which pair is selected:

{½[4x + 2y = 6]
{−2x + 2y = 18
>> 
Plug this back into the system to get the x-value of 
I am joyous to assist you at any time.
Answer:
20
Step-by-step explanation: