Matéria: Matemática
Autor: kamilepascoal11
Perguntado 8 anos atrás

X/6 = X/4
5x - 3y= 36

Respostas

respondido por: AnnaCarolinaAlmeida

{x/6 = y/4 (I)
{5x - 3y = 36 (II)

(I) x . 4 = 6 . y
(I) x = 6y/4

Substitui (6y/4) na (II) no lugar do x:

5x - 3y = 36
(II)
5.(6y/4) - 3y = 36
30y/4 - 3y = 36

Tira o MMC de 4 e 1 que é 4.

30y - 12y = 144
18y = 144
y = 144/18
y =
8

Substituíndo (8) em (I):

x/6 = y/4
x/6 = 8/4
x/6 = 2
x = 6 . 2
x = 12

Resp: x = 12 e y = 8

Espero ter ajudado!!!!

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