Question

ajutor. nu stiu cum sa fac

Answer 1

$\frac{a + b}{2} = 9.5$

$a = \frac{2}{3} \times b$

$\frac{ \frac{2}{3}b + {}^{3)} b }{2} = 9.5 \\ \\ \\ \frac{ \frac{2b + 3b}{3} }{2} = 9.5 \\ \frac{5b}{6} = 9.5 \\ 5b = 9.5 \times 6 \\ 5b = 57 \\ b = 57 \div 5 \\ \red{ \boxed{b = 11.4}}$

$a = \frac{2}{3} \times 11.4 = \frac{22.8}{3} = \red{ \boxed{ 7.6}}$