Question

1,3n+4=13+n решите уровнение.срочно!!!

Answer 1

1,3n-n=13-4
0.3n=9
n=9:0.3
n=30

Answer 2

$1,3n+4=13+n$
$1,3n-n=13-4$
$0,3n=9$
$n= frac{9}{0,3} =30$