Question

Am nevoie de răspuns urgent. ​

Answer 1

$x + (x + 2.5) + 2x = 12.5$

$x + x + 2.5 + 2x = 12.5$

$4x + 2.5 = 12.5$

$4x = 12.5 - 2.5$

$4x = 10$

$x = \frac{5}{2}$