Răspunsuri

2014-08-01T13:59:39+03:00
X/y=2/5

x=2y/5

(2x+5y)/(3x+8y)=  (2*2y/5+5y)/(3*2y/5 +8y) =

=(4y/5 +5y)/ (6y/5 +8y)    aducem la acelasi numitor in (...)=

=(4y+25y)/5 /(6y+40y)/5=

=29y/5/46y/5=

=29y/5 * 5/46y=

=29/46

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