How do you message a moderator.

You cant

Explanation:

you can only become one

(hope this helps can I pls have brainlist (crown) ☺️)

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

2. list two reasons why fossil fuels should no longer be used as a source of energy in america.