tolong ya caranya melalui cara persamaan eksponen

^ tanda pangkat
2^x + 2^(x+2) = 12
2^x + 2^x . 2² = 12
2^x + 2^x . 4 = 12
2^x + 4.2^x = 12
5.2^x = 12
2^x = 12/5
x = ²log (12/5)