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daca a+b=12 si b+c=26 calculati 2 x A +5 x B +3 x C

URGENT

Răspuns :

Mikelina

a+b=12

b+c=26

2a+5b+3c=?

5b=2b+3b

2a+2b+3b+3c=

2(a+b)+3(b+c)=

2×12+3×26=

24+78=

102

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