Question

tìm phân số tối giảm a/b biết : 1/3-1/2+a/b=1/2

Answer 1

`1/3 -1/2 +a/b =1/2`

`=> a/b =1/2 -(1/3 -1/2)`

`=> a/b= 1/2 -  1/3 +1/2`

`=> a/b= 3/6 -2/6 + 3/6`

`=> a/b= 4/6`

`=> a/b=2/3`

Vậy `1/3-1/2 + 2/3= 1/2`

` @`\(Minnekchan\)

Answer 2

\(\dfrac{1}{3}-\dfrac{1}{2}+\dfrac{a}{b}=\dfrac{1}{2}\)

\(\dfrac{a}{b}=\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{2}\)

\(\dfrac{a}{b}=1-\dfrac{1}{3}\)

\(\dfrac{a}{b}=\dfrac{2}{3}\)