Mr. Jones is a geographical scientist. He researches the rise in the carbon dioxide level due to increasing pollution. In 2003, the average carbon dioxide level was about 223 billion metric tons, and in 2008, it was about 1,350 billion metric tons.

I think u have choose incorrect subject ur question is related to science but u have took maths

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

the correct answer is d

hope this