a=1+x+y d=4y g=2x5ya=1+x+y d=4y g=2x5y \begin{gathered}[t] a = 1 + x + y \\ d = 4 - y \\ g = 2x - 5y \end{gathered} \begin{gathered}[b] a = 1 + x + y \\ d = 4 - y \\ g = 2x - 5y \end{gathered}