Need help with chemistry equations

Need to balance these three equations, if anyone can im stumped

Al(OH)3 (aq) + H2CO3(aq)  H20(l) + Al2(CO3)3 (aq)
Mg(OH)2(aq) + HNO3(aq)  H20(l) + Mg(N03)2(aq)
Mg(OH)2(aq) + H3PO4 (aq) H20(l) + Mg3(PO4)2( aq)

 

I'll do one. The rest are done the same. I'll igve you a hint. Balance the least common elements first. In this case, aluminum, then carbon, then hydrogen, then oxygen.

1. 2(Al(OH)3) +3(H2CO3)>>6(H2O) +Al2(CO3)3

 

To illustrate better:

 

k thnx i got it finally

 

*seizure*

 

lol