Question

m+n=30 n+p=38 m+p=32 grafica Multumesc!

Answer 1

m+n=30
n+p=38
m+p=32
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2m+2n+2p=30+38+32
2m+2n+2p=100
2x(m+n+p)=100/:2
m+n+p=50
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30(m+n)+p=50/-30
p=20
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n+20(p)=38/-20
n=18
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m+18(n)+20(p)=50/-20
m+18=30/-18
m=12
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