Question

Answer 1

x(1+1/2+1/3+1/6)=-12

x.2=-12

x=-12:2

x=-6

Answer 2

\(x+\dfrac{x}{2}+\dfrac{x}{3}+\dfrac{x}{6}=-12\\ \Leftrightarrow x\left(1+\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}\right)=-12\\ \Leftrightarrow x.2=-12\\ \Leftrightarrow x=-6\)

Vậy `x=-6`

Answer 3

\(x+\dfrac{x}{2}+\dfrac{x}{3}+\dfrac{x}{6}=-12\)

\(x.\left(1-\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}\right)=-12\)

\(x.2=-12\)

\(x=-12:2\)

\(x=-6\)

Answer 4

x = -6