Question

Equação exponencial-Quanto dá 3x-5= 271-x?

Answer 1

$3^{x-5}=27^{1-x}$

$3^{x-5}=(3^3)^{1-x}$

$3^{x-5}=3^{3-3x}$

$x-5=3-3x$

$x+3x=3+5$

$4x=8$

$x=2$

Answer 2

$3^{x-5}=27^{1-x}\\ \\ 3^{x-5}=(3^3)^{1-x}\\ \\ 3^{x-5}=3^{3-3x}\\ \\ x-5=3-3x\\ \\ 4x=8\\ \\ \boxed{x=2}$