Question

Problema 22.Cine ma plate ajuta?

Answer 1

$x + \frac{x}{3} + 3x = 52 \: | \times 3$

$3x + x + 9x =156$

$13x = 156$

$x = \frac{156}{13}$

$x = 12$

Answer 2

treimea - x/3
intreitul - 3x
x + x/3 + 3x = 52
4x + x/3 = 52 |•3
12x+x=52•3
13x=52•3
x=(52•3)/13
x=4•3
x=12

Verificare
12 + 12/3 + 12•3 =
12+4+36=
52