Solve the following pair of linear equations in two variables: 𝟕𝒙 − 𝒚 = 𝟑 …(𝒊); 𝒙 + 𝟓𝒚 = 𝟐𝟏 …(𝒊𝒊).
The pair of equations y=0 and y=3 has ___________________.