Question

Answer 1

a,12.x= -36 

<=> x = -3.

Vậy...

b,2.|x| =16

<=> |x| = 8

<=> x = { 8;-8}

Vậy...

Answer 2

a, 12.x=-36

      x=-36:12

      x=-3

vậy x=-3

b,2./x/=16

/x/=16:2

/x/=8

⇒x=-8  ;    x= 8

vậy x=-8, x=8

Answer 3

a) Ta có: \(12\cdot x=-36\)

\(\Leftrightarrow x=-36:12\)

\(\Leftrightarrow x=-3\)

Vậy: x=-3

b) Ta có: \(2\cdot\left|x\right|=16\)

\(\Leftrightarrow\left|x\right|=8\)

hay \(x\in\left\{8;-8\right\}\)

Vậy: \(x\in\left\{8;-8\right\}\)