Resposta:
Vamos lá
Resolva a equação logx+3 (5x - 1) = 1
log(5x - 1)/log(x + 3) = 1
log(5x - 1) = log(x + 3)
5x - 1 = x + 3
5x - x = 3 + 1
4x = 4
x = 1
log4(4) = 1 ok
