Question

Tìm x

13 + x/20 = 3/4

Answer 1

`1/3 + x/20 = 3/4`

`<=> x/20 = 3/4 - 1/3`

`<=> x/20 = 5/12`

Vậy `x = 5/12`

Answer 2

\(13+\dfrac{x}{20}=\dfrac{3}{4}\) 

         \(\dfrac{x}{20}=\dfrac{3}{4}-13\)

         \(\dfrac{x}{20}=-\dfrac{49}{4}\)

          \(x=\dfrac{\left(-49\cdot20\right)}{4}\)

          \(x=-\dfrac{980}{4}\)

          \(x=-245\)