Question

5n+(13,4-2n)=16,4n решение)))

Answer 1

5n+(13,4-2n)=16,4n
5n+13,4-2n=16,4n
13,4=16,4-5n+2n
13,4=13,4n
n=13,4:13,4
n=1

Answer 2

спасибо))