[tex] \frac{x+y}{2} =8.15+(x-y) \\ x= \frac{1}{2} *y=0.5*y \\ \frac{0.5*y+y}{2} =8.15+(0.5*y-y) \\ 0.5*y+y=16.3+2(0.5*y-y) \\ 0.5*y+y=16.3+y-2y \\ 0.5*y+y=16.3-y \\ 0.5y+2y=16.3 \\ 2.5y=16.3 \\ y= \frac{16.3}{2.5} =6.52=6 \frac{52}{100} =6 \frac{26}{50}
=6 \frac{13}{25} [/tex]
sper ca te-am ajutat!
