Question

tìm x biết :

(-4/3+x) .2=20%

Answer 1

\(\left(-\dfrac{4}{3}+x\right).2=20\%\\ \Rightarrow\left(-\dfrac{4}{3}\right).2+2x=\dfrac{1}{5}\\ \Rightarrow-\dfrac{8}{3}+2x-\dfrac{1}{5}=0\\ \Rightarrow2x-\dfrac{43}{15}=0\\ \Rightarrow2x=\dfrac{43}{15}\\ \Rightarrow x=\dfrac{43}{30}\)

Answer 2

[ -4/3+x ] x2= \(\dfrac{20}{100}\)

[ -4/3+x] = 20/100 : 2

[ -4/3+x ] = \(\dfrac{1}{10}\)

          x= 1/10 - [-4/3]

          X= \(\dfrac{43}{30}\)