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Stiind ca x+y+16=24determinati19+2 x y+2 x x

Răspuns :

x + y + 16 = 24

x + y = 24 - 16

x + y = 8

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19 + 2 x + 2 y = 19 + 2 × ( x + y ) = 19 + 2 ×  8 = 19 + 16 = 35