Question

ex. 3 : Daca a,b,c sunt numere naturale si a+b+c=18, iar 2a+b+2c+25 , atunci calcualti (a+c)x(3a+2b+3c).

Answer 1

1)25-18=7=a+c
2)3a+2b+3c=(a+b+c)+(2a+b+2c)=18+25=43
3)7 X 43=301

raspuns: 301