Question

7. b) Daca $\frac{x}{y}$=$\frac{3}{5}$ ,$y\neq 0$ ,atunci $\frac{4x+6y}{x+y}$= ?

c)Daca $\frac{x}{4}$=$\frac{y}{7}$, atunci $\frac{9x-2y}{x+3y} =$ ??

d)Daca $\frac{x}{2} = \frac{y}{9} ,atunci \frac{10x - 2y}{5x + y} = ?$

Answer 1

5x=3y => x=3y/5 si inlocuiesti in relatie. atat a) cat si b), c) functioneaza pe acelasi principiu