Question

daca a,b,c sunt numere naturale astfel incat 3xa+b=111 si 2xb+c=222 calculati 6xa+8xb+3xc

Answer 1

 

$\displaystyle\\3a + b ~~~~= 111~~~\Big|~\times 2\\~~~~~~2b + c = 222~~~\Big|~\times 3\\\\6a + 2b~~~~~~=222\\~~~~~~~~6b + 3c = 666\\-----------\\\boxed{\bf 6a + 8b + 3c=888}$