In the seventh grade rachel read 15 books and that is great she read a tin box find a present because in the number of books)

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:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value