Question

Ajutor la ex 6 va rogg dau coroanaaa!!!!!

Answer 1

a)

$\frac{4x}{5y}=\frac{4}{5}\frac{x}{y}=\frac{4}{5}\frac{2}{7}=\frac{8}{35}$

b)

$\frac{x+y}{x}=\frac{x}{x}+\frac{y}{x}=1+\frac{y}{x}=1+\frac{7}{2}=\frac{9}{2}$

c)

$\frac{y}{y-x}=\frac{y}{y(1-\frac{x}{y})}=\frac{1}{1-\frac{x}{y}}=\frac{1}{1-\frac{2}{7}}=\frac{1}{\frac{5}{7}}=\frac{7}{5}$

d)

$\frac{2x+y}{3y-5x}=\frac{y(2\frac{x}{y}+1)}{y(3-5\frac{x}{y})}=\frac{2\frac{x}{y}+1}{3-5\frac{x}{y}}=\frac{2\frac{2}{7}+1}{3-5\frac{2}{7}}=\frac{\frac{11}{7}}{\frac{11}{7}}=1$

Spor!