Question

DECAT 3 SI 4 VA ROG DAU COROANA SI 30 P​

Answer 1

Răspuns:

3.

x=2y/3

a)(3•2y/3) : 4y =

2y : 4y =

1/2

b)(2y/3 + 2) : (y+3) =

((2y+6)/3 • 1/(y+3) =

2(y+3)/3 • 1/(y+3) =

2/3

4.

5a=2b (produsul mezilor = produsul extremilor)

a)a/b=2/5

b)a=2b/5

(2b/5 + 2) : (b+5) =

(2b+10)/5 • 1/(b+5) =

2(b+5)/5 • 1/(b+5) =

2/5