Question

Tìm x

\(a,x-\dfrac{1}{5}=\dfrac{2}{7}\\ b,\dfrac{x-7}{12}=\dfrac{5}{3}\)

Answer 1

:)?

Answer 2

a, \(x=\dfrac{2}{7}+\dfrac{1}{5}=\dfrac{17}{35}\)

b, \(\Leftrightarrow3x-21=60\Leftrightarrow x=27\)

Answer 3

\(a.\Rightarrow x=\dfrac{2}{7}+\dfrac{1}{5}=\dfrac{17}{35}.\\ b.\Rightarrow\dfrac{x-7}{12}=\dfrac{20}{12}.\Rightarrow x-7=20.\Leftrightarrow x=27.\)

Answer 4

a) \(x-\dfrac{1}{5}=\dfrac{2}{7}\Rightarrow x=\dfrac{2}{7}+\dfrac{1}{5}\Rightarrow x=\dfrac{17}{35}\) 

b) \(\dfrac{x-7}{12}=\dfrac{5}{3}\Rightarrow x-\dfrac{7}{12}=\dfrac{5}{3}\Rightarrow x=\dfrac{5}{3}+\dfrac{7}{12}\Rightarrow x=\dfrac{9}{4}\)

Answer 5

a: =>x=2/7+1/5=10/35+7/35=17/35

b: =>x-7=20

hay x=27