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daca x+y=8 si y+2z=35 calculati 7x+10y+6z=

Răspuns :

descompunem 7x+7y+3y+6z=7(x+y)+3(y+2z)=7*8+3*35=56+105=161
7x+7y+3y+6z=7(x+y)+3(y+2z)=7x8+3x35=56+105=161