2x-4y=8
2x=4y+8
x=2y+4
^^^^^^^
<h3>
Explanation:</h3>
There is a theorem :

Proof: open the brackets on right side of equality by using distributive property
RHS = a(a+b) - b(a+b)
RHS = 
RHS =
= LHS
Using the above theorem you can solve every question you asked:
Answer:
$$$$$$$$ the anwser is 4 i think thats how you solve it
Step-by-step explanation:
<span>2/3+0=2/3
</span>If you added 0 to get the same number
answer
Additive Identity
hope it helps