Question

`d) ( 0,75 - 2x) : 13/49 = 7/26`

Answer 1

\(0,75-2x=\dfrac{7}{26}.\dfrac{13}{49}\\ 0,75-2x=\dfrac{1}{14}\\ 2x=0,75-\dfrac{1}{14}\\ 2x=\dfrac{3}{4}-\dfrac{1}{14}\\ 2x=\dfrac{3.14-4}{56}\\ 2x=\dfrac{19}{28}\\ x=\dfrac{19}{28}:2\\ x=\dfrac{19}{56}\)

Answer 2

\(\left(0,75-2x\right):\dfrac{13}{49}=\dfrac{7}{26}\)

\(\Rightarrow\dfrac{3}{4}-2x=\dfrac{1}{14}\)

\(\Rightarrow2x=\dfrac{3}{4}-\dfrac{1}{14}\)

\(\Rightarrow2x=\dfrac{21}{28}-\dfrac{2}{28}\)

\(\Rightarrow2x=\dfrac{19}{28}\)

\(\Rightarrow x=\dfrac{19}{56}\)

Answer 3

\(\left(0,75-2x\right):\dfrac{13}{49}=\dfrac{7}{26}\)

\(0,75-2x=\dfrac{7}{26}.\dfrac{13}{49}\)

\(0,75-2x=\dfrac{1}{14}\)

\(2x=0,75-\dfrac{2}{7}\)

\(2x=\dfrac{3}{4}-\dfrac{1}{14}\)

\(2x=\dfrac{19}{28}\)

\(x=\dfrac{19}{28}:2\)

\(x=\dfrac{19}{56}\)

Vậy \(x=\dfrac{19}{56}\)