[tex] \frac{x + 0.4}{3.2} = \frac{x}{2} [/tex]
Aflati proportia

ai rezolvarea în imagine

[tex]\dfrac{x+0,4}{3.2} = \dfrac{x}{2} \\ \\ x+0.4 = 3.2 \cdot \dfrac{x}{2} \\ \\ x+0.4 = 1.6x\\ \\ x - 1.6x = -0.4 \\ \\ x(1 - 1.6) = -0.4 \\ \\ -0.6x = -0.4 \\ \\ x = \dfrac{0.4}{0.6} \\ \\ x = \dfrac{0.2}{0.3} \\ \\ x = \dfrac{0.6}{0.9} \\ \\ x = \dfrac{6}{9} \\ \\ x = 0,(6) [/tex]