Question

tìm x biết

x - 3/4 . x + 1/2 = 0

Answer 1

\(x-\dfrac{3}{4}.x+\dfrac{1}{2}=0\)

\(4x-3x+2=0\)

\(x+2=0\Rightarrow x=-2\)

Answer 2

\(x-\dfrac{3}{4}.x+\dfrac{1}{2}=0\)

= \(x.\left(1-\dfrac{3}{4}\right)\)= \(0-\dfrac{1}{2}\)

= \(x.\dfrac{1}{4}=\dfrac{-1}{2}\)

\(x=\dfrac{-1}{2}:\dfrac{1}{4}\)

\(x=-2\)