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Inesainesa90
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calculati :(5x-2y),stiind ca 3x+4y+2/2x+7y+3=2/3

Răspuns :

Monicuta9
3(3x+4y+2)=2(2x+7y+3) ; 9x+12y+6=4x+14y+6 ; (9x-4x)+(12y-14y)=6-6 ;5x-2y=0
Gly
[tex]\dfrac{3x+4y+2}{2x+7y+3}=[tex]\dfrac{2}{3}[/tex}
3(3x+4y+2)=2(2x+7y+3)
9x+12y+6=4x+14y+6
(9x-4x)+(12y-14y)=5-6
5x+2y=0

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