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rezolvati:Stiind ca m+n=17,n+p=15,p+M=18,determina valorile m,n,p!Dau 12 puncte

Răspuns :

2m+2n+2p = 17+15+18
2(m+n+p) = 50
m+n+p = 50:2
m+n+p = 25
17+p = 25
p = 25-17
p = 8
n+p = 15
n+8=15
n = 15-8
n = 7
p+m = 18
8+m = 18
m = 18-8
m = 10
m+n+n+p+p+m=50. (Am adunat cele trei relatii) 2m+2n+2p=50 m+n+p=25 17+p=25, p=8 n=15-8=7 m=18-8=10