Avet measured the mass of two birds. the mass of robin was 76.64 grams. the mass of the blue jay was 81.54 grams estimate the difference in the masses of the birds

well for this one all u have to do is estimate to the closer number then subtract

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: