posted by mili .
a basket of with 12 apples has a mass of 3105 grams. the same basket with 7 apples has a mass of 1,980 grams. each apple has the same mass. what is the mass of the basket?
each apple has a mass of (3105-1980)/5
figure that out, then
mass=number*eachapplemass + basket
so let the number of apples 7
solve for basket