Question

Va rog sa ma ajutati si pe mine. Ofer coronita .
Aflati x din proportiile:

x+2 supra 3 = 27 supra x+2

0,(2) supra x = x supra 2

Answer 1

$\frac{x+2}{3}= \frac{27}{x+2} \\ (x+2)^2=81 \\ x+2=9 saux+2=-9 \\ x=7saux=-11 \\ S={-11;7}$

$\frac{0,(2)}{x}= \frac{x}{2} \\ \frac{ \frac{2}{9} }{x}= \frac{x}{2} \\ \frac{4}{9}=x^2 \\ x=- \frac{2}{3} \\ x= \frac{2}{3}$