How can I balance this chemical equation?

[Precursor]

Homework Statement
I am to balance the following equation:
Al(OH)41-(aq) + H2SO4(aq) ---> Al(OH)3(s) + H2O + SO42-

The attempt at a solution

Al(OH)41-(aq) + H2SO4(aq) ---> Al(OH)3(s) + 3/2H2O + SO42-

The bolded part above is all I could add to the equation, but I now need to balance the oxygen. This is where I am stuck. Any help is appreciated.

 

[Borek]

It is not only oxygen, there are more problems with the equation - charge is not balanced.

Al(OH)₄^- loses OH^-, H₂SO₄ loses 2H⁺. Try to start from here.

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