Question

70:\(\frac{4x+720}{x}\) = \(\frac{1}{2}\)

Answer 1

\(70:\frac{4x+720}{x}=\frac{1}{2}\)

\(\Rightarrow\frac{4x+720}{x}=70:\frac{1}{2}=70.2=140\)

\(\Rightarrow4x+720=140.x\)

\(\Rightarrow720=136.x\)

\(\Rightarrow x=720:36=20\)

Answer 2

70:(4x+720/x)=1/2

<=>4x+720/x=140

=>4x+720=140x

<=>720=136x

<=>90=17x(chia hai vế cho 8)

<=>90/17=x

Vậy x=90/17