Tentukan nilai a agar : a log 81 - 2 a log 27 - a log 27 + a log 343 = 6

a log 81- 2a log 27- a log 27 + a log 243=6

a log 3⁴ - 3a log 3³ + a log 3^5 = a log a^6
4 a log 3 - 9 a log 3 + 5 a log 3 = a log a^6
a log 3(4-9+5)=a log a^6
3(0)=a^6
0=a^6
a=0