F(x)=-17-87-20x2+ 7y?
9(x)=-13-15x + 2072-193
What is f + g?

i think c. but don't trust it.

step-by-step explanation:

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:

but which class are u may know that first