Question

1 tìm x

                 \(\frac{37-x}{x+13}\)=\(\frac{3}{7}\)

 

Answer 1

\(\frac{37-x}{x+13}=\frac{3}{7}\)

\(\Rightarrow7\left(37-x\right)=3\left(x+13\right)\)

\(\Rightarrow259-7x=3x+39\)

\(\Rightarrow3x+7x=259-39\)

\(\Rightarrow10x=220\)

\(\Rightarrow x=22\)

Answer 2

đề bài=> 7(37-x)=3(x+13)
         =>259-7x = 3x+39
         => 259-39 =3x+7x
         =>220=10x
         =>x=22

Answer 3

37−x/x+13 =37 

⇒7(37−x)=3(x+13)

⇒259−7x=3x+39

⇒3x+7x=259−39

⇒10x=220

⇒x=22