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a,b i.p. 1/2,1/3 iar 2a+3b=6,5

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Răspuns :

Răspuns:

[tex] \frac{a}{2} = \frac{b}{3} = k \\ a = 2k \\ b = 3k \\ 4k + 9k = \frac{13}{2} \\ 8k + 18k = 13 \\ 26k = 13 \\ k = 0.5 \\ a = 1 \\ b = 1.5[/tex]