Question

Qual o valor das incógnitas?
3 - x = 4
y + 2 = -2
3z = 0
a) x= -1/y=-2 / z = 0
b) x= 1 /y = - 6 / 2 - 3
c) x=-1/y = - 4 / z = 0
d)x = 0 /y = 4 / z = 5​

Answer 1

Resposta:

$y + 2 = - 2 < = > \\ y = - 2 - 2 < = > \\ y = - 4 < = > \\ \frac{y}{y} = \frac{ - 4}{1} < = > \\ y = - 4$

$3z = 0 < = > \\ \frac{3z}{3} = \frac{0}{3} < = > \\ z = 0$

$3 - x = 4 < = > \\ - x = 4 - 3 < = > \\ - x = 1 < = > \\ \frac{ - x}{ - x} = \frac{1}{ - 1} < = > \\ x = - 1$

Resposta c).

Espero ter ajudado