Răspuns :
Răspuns:
Explicație pas cu pas:
x = 5a
y = 5b
z = 5c
5x + 3y + 2z = 25a + 15b + 10c = 5(5a + 3b + 2c) = 5*45 = 225
[tex]\dfrac{a}{x}=\dfrac{b}{y}=\dfrac{c}{z} = \dfrac{1}{5} \Rightarrow \dfrac{x}{a}=\dfrac{y}{b} = \dfrac{z}{c} = 5 \Rightarrow x = 5a,~y = 5b,~z = 5c\\ \\ 5a+3b+2c = 45\\ \\E =5x+3y+2z = 5(5a)+3(5b)+2(5c) = 5(5a+3b+2c) = 5\cdot 45 \\ \\ \Rightarrow \boxed{E =225}[/tex]