Hey there!
NaBr + Ca(OH)₂ → CaBr₂ + NaOH
Balance OH.
2 on the left, 1 on the right. Add a coefficient of 2 in front of NaOH.
NaBr + Ca(OH)₂ → CaBr₂ + 2NaOH
Balance Na.
1 on the left, 2 on the right. Add a coefficient of 2 in front of NaBr.
2NaBr + Ca(OH)₂ → CaBr₂ + 2NaOH
Balance Br.
2 on the left, 2 on the right. Already balanced.
Balance Ca.
1 on the left, 1 on the right. Already balanced.
Our final balanced equation:
2NaBr + Ca(OH)₂ → CaBr₂ + 2NaOH
Hope this helps!