Răspuns :
m+ 3n +2p =?
m +n = 10
n+p = 100
m+n+n+n+p+p =(m+n) +(n+p)+(n+p) = 10+100+100 =210
m +n = 10
n+p = 100
m+n+n+n+p+p =(m+n) +(n+p)+(n+p) = 10+100+100 =210