Question

Se stie ca a/x egal b/y egal c/z
B/y egal 2
X + y + z egal 4.5
Calculați a + b + c

Answer 1

$\frac{a}{x} = \frac{b}{y} = \frac{c}{z } = 2 = \frac{2}{1} \\ = > a = 2x \\ b = 2y \\ c = 2z$
$= > a + b + c = 2x + 2y + 2z = \\ = 2(x + y + z) \\ x + y + z = 4.5 \\ = > a + b + c = 2 \times 4.5 = 9$

Answer 2

==================================