How do you solve this equation ___ Al + ___ Na1 O1 H1 - ___Na3 Al1 O3 + __ H2

By solve do you mean balance? If you do then

2 Al + 6 NaOH = 2 Na₃AlO₃ + 3 H₂

because:

Al + NaOH = Na3AlO3 + H2

There must be the same number of atoms of each element both sides of the equation, therefore to balance the equation there must be more than 1 atom of elements otherwise there will be left over atoms