Question

Va rog frumos!!!
Dau coroană!!!​

Answer 1

Răspuns:

x=39

Explicație pas cu pas:

$\frac{5}{8}$ [$\frac{5}{8}$+$\frac{5}{8}$($\frac{8x+3}{5}$)]=25

$\frac{5}{8}$ [$\frac{5}{8}$+ $\frac{8x+3}{8}$]=25

$\frac{5}{8}$($\frac{8(x+1)}{8}$)=25

$\frac{5(x+1)}{8}$=25/ ·$\frac{8}{5}$

x+1= 40

=> x=39