Question

Stiind ca m+n=17; n+p=15; p+m=18, determina valorile m,n,p. Multumesc!!!

Answer 1

adunam cele 3 ecuatii
m+n+n+p+p+m = 17+15+18
2×m+2×n+2×p = 50
2(m+n+p) = 50
m+n+p = 50:2
m+n+p = 25
inlocuim pe m+n cu 17
p = 25-17
p = 8
inlocuim pe n+p cu 15
m = 25-15
m = 10
inlocuim pe p+m cu 18
n = 25-18
n = 7
Verificare:
8+10+7 = 25

Answer 2

m+n+n+p+p+m=17+18+15
2m+2n+2p=50
m+n+p=50:2=25
m+n+n+p=15+17=32
m+n+p+m=17+18=35
2m+n+p-m-2n-p=35-32=3
m-n=3

m-n=3  => m=n+3
n+3+n=17
2n+3=17
2n=17-3
n=14:2
n=7
m=n+3=7+3=10
p=18-10=8