Tinaana25ask
a fost răspuns

daca x supra y=cu 4 supra 9 si y≠0,calculati 3x+2y supra 5x=y

Răspuns :

Miky93ask
x/y=4/9

x=4y/9

(3x+2y)/(5x+y)

(3*4y/9+2y)/ (5*4y/9+y)

(4y/3+2y)/ (20y/9+y)  aducem la acelasi numitor in paranteze

(4y+6y)3/(20y+9y)/9

10y/3/29y/9

10y/3 *9/29y=

30y/29y=  30/29

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