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2a+3c-b!
b+4a-2c!
(a+c)x9-b


Răspuns :

2a+3c-b=2x5+3x2-13=10+6-13=3
b+4a-2c=13+4x5-2x2=13+20-4=29
(a+c)x9-b=(5+2)x9-13=7x9-13=63-13=50
Multa bafta!! :)