Question

Daca x/y=5/9 aflati 4x+5y/3x+2y=? va rog ajutatima.
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Answer 1

Răspuns:

Explicație pas cu pas:

(4x+5y)/(3x+2y)=y(4x/y+5)/y(3x/y+2)=(4×r+5)/(3r+2) unde r=5/9

(4×5/9+5)/(3×5/9+2)=(20+45)/(15+18)=65/33

Answer 2

x/y=5/9=k

x=5k

y=9k

4x+5y/3x+2y=4×5k+5×9k/3×5k+2×9k=20k+45k/15k+18k=65k/33k=65/33(am simplificat fractia prin k)