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daca x/y=3/5,aflați pe 5x-y/2y-3x

a.0,6
b.1,(6)
c.10
d.5​


Răspuns :

Răspuns:

[tex] \frac{x}{y} = \frac{3}{5} = > x = \frac{3y}{5} [/tex]

[tex] \frac{5 \times \frac{3y}{5} - y}{2y - 3 \times \frac{3y}{5} } = \frac{2y}{2y - \frac{9y}{5} } = \frac{2y}{ \frac{y}{5} } = 2y \times \frac{5}{y} = 10[/tex]