Question

x-1 phần x+5 =6 phần 7

 

Answer 1

\(\dfrac{x-1}{x+5}=\dfrac{6}{7}\)

\(\Leftrightarrow7x-7=6x+30\)

hay x=37

Answer 2

https://hoc24.vn/cau-hoi/x-1-x5-6-7.2213164730326

Answer 3

\(\dfrac{x-1}{x+5}=\dfrac{6}{7}\)

\(\Leftrightarrow6\left(x+5\right)=7\left(x-1\right)\)

\(\Leftrightarrow6x+30=7x-7\)

\(\Leftrightarrow30+7=7x-6x\)

\(\Leftrightarrow x=37\)

Answer 4

\(\dfrac{x-1}{x+5}=\dfrac{6}{7}\)

đk: x < -5 

\(\Rightarrow\left(x+5\right).6=\left(x-1\right).7\)

\(\Rightarrow6x+30=7x-7\)

\(\Rightarrow6x-7x=-7-30\)

\(\Rightarrow-x=-37\)

\(\Rightarrow x=37\)

( thỏa mãn)