Question

(s:48)-(s:50) = 20
tìm s

Answer 1

`(s:48)-(s:50)=20`

`<=>s/48-s/50=20`

`<=>(25s)/1200-(24s)/1200=20`

`<=>s/1200=20`

`<=>s=24000`

Vậy `s=24000`

Answer 2

\(\dfrac{S}{48}-\dfrac{S}{50}=20\)

\(\Leftrightarrow\dfrac{50S-48S}{48\cdot50}=20\)

\(\Leftrightarrow2S=48\cdot50\cdot20=48000\)

\(\Leftrightarrow S=24000\)

Answer 3

\(\dfrac{s}{48}-\dfrac{s}{50}=20\)

\(\Leftrightarrow\dfrac{25s}{1200}-\dfrac{24s}{1200}=\dfrac{24000}{1200}\)

\(\Rightarrow s=24000\)