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afla suma m+n+p dacă m+n=21 n+p= 13 m+p= 26​

Răspuns :

Dianageorgiana794

Răspuns:

m+n+n+p+m+p=21+13+26

2(m+n+p)=60=>m+n+p=60:2=>m+n+p=30

m + n = 21

n + p = 13

m + p = 26

m + p + n = ?

m + n + n + p + m + p = 2 * ( m + n + p )

21 + 13 + 26 = 2( m + n + p )

60 = 2( m + n + p )

m + n + p = 60 : 2

m + n + p = 30.

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