Question

Descubra o valor de x para q a igualdade abaixo sendo valida log2(3x+10)-log2 x= log2 5

Answer 1

$log_2(3x+10)-log_2x=log_25\\\\log_2\frac{3x+10}{x}=log_25\\\\\frac{3x+10}{x}=5\\\\3x+10=5x\\\\5x-3x=10\\\\2x=10\\\\x=\frac{10}{2}\\ \\x=5$