Question

Answer 1

a: 1/4x=3/4-5/6=9/12-10/12=-1/12

=>x=-1/3

b: (12-12-1/3):x=-2/3-1/6=-4/6-1/6=-5/6

=>-1/3:x=-5/6

=>1/3:x=5/6

=>x=1/3:5/6=2/5

c: 4/x=x/16

=>x²=64

=>x=8 hoặc x=-8

Answer 2

a)\(x=\left(\dfrac{3}{4}-\dfrac{5}{6}\right):\dfrac{1}{4}=-\dfrac{1}{12}:\dfrac{1}{4}=-\dfrac{1}{3}\)

b)\(=>\dfrac{1}{3}:x=\left(-\dfrac{2}{3}\right)-\dfrac{1}{6}=-\dfrac{5}{6}\)

\(=>x=\dfrac{1}{3}:\left(-\dfrac{5}{6}\right)=-\dfrac{2}{5}\)

c)\(=>x^2=4.16=64=>\left[{}\begin{matrix}x=-8\\x=8\end{matrix}\right.\)