Question

Coroana !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 1) a,b,c sunt numere naturale astfel incat a+b+c=32 si a+b+c+a+c=57n, calculeaza : (a+c)x(3 x a + 3 x c + 2 x b ) .

2) Afla pe a , daca : a+b=c , a+c=d , d-c=2

Answer 1

1) a+b+c=32
a+b+c+a+c=57    a+c=57-32=25
b=7
(a+c)(3a+3c+2b)=25(75+14)=25*89=2225
2) a+b=c
a+c=d
d-c=2
a+c-c=2
a=2