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aflati valoarea expr.
4a+7b+6c
daca a+b=16
si b+2c=28


Răspuns :

4(a+b)+3(b+2c)=16x4+28x3
4a+7b+6c=64+84=148
4a+4b+3b+6c=
4(a+b)+3(b+2c)=4*16+3*28=64+84=148