Question

giải phương trình

\(\dfrac{x}{30}=\dfrac{x-10}{10}\)

giải hộ mình với ạ 

 

Answer 1

x.10=(x-10).30

=>10x=30x-300

=>10x-30x+300=0

=>-20x-300=0

=>x=15

Answer 2

\(\Leftrightarrow\dfrac{x}{30}-\dfrac{x-10}{10}=0\)

\(\Leftrightarrow\dfrac{x-3\left(x-10\right)}{30}=0\)

\(\Leftrightarrow x-3x+30=0\)

\(\Leftrightarrow-2x+30=0\)

\(\Leftrightarrow-2x=-30\)

\(\Leftrightarrow x=15\)

Answer 3

\(=>x.10=30x-300\)

\(=>10x-30x-300=0\)

\(=>-20x=300\)

\(=>x=-15\)