Question

aflati valoarea expresii 4a+7b+6c,stiind ca a+b=16 si b+2c=28

Answer 1

$4a+7b+6c=? \\ a+b=16| \cdot 4 \\ b+2c=28| \cdot 3 \\ 4a+4b=64 \\ 3b+6c=84 \\ 4a+4b+3b+6c=64+84 \\ 4a+7b+6c=64+84 \\ \boxed{4a+7b+6c=148}$