What number must be added to 51 to get a sum of 0?

-51

Step-by-step explanation:

51+(-51)

stop using this to cheat on home work

step-by-step explanation:

dfbvfvdf

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: