Question

решите уравнение 5^x-5^x-1 =100

Answer 1

$5^x-5^{x-1}=100$
$5^{x-1}(5-1)=100$
$5^{x-1}4=100$
$5^{x-1}=25$
$5^{x-1}=5^2$
$x-1=2$
$x=3$