Question

Aflati pe x din egalitatea : 2 la puterea x+3 + 2 la puterea x+2 + 2 la puterea x = 56

Answer 1

$2^{x} ( 2^{3} + 2^{2} +1)=52$
$2^{x} (8+4+1)=52$
$2^{x} *13=52$
$2^{x} =52/13$
$2^{x} =4$
$2^{x} = 2^{2}$
x=2