Tìm x, biết: \(\Large 4 + x + \dfrac{3}{4}\) = \(\Large\dfrac{17}{2}\)

Tìm x, biết:

\(\Large 4 + x + \dfrac{3}{4}\) =  \(\Large\dfrac{17}{2}\)

(Viết đáp án dưới dạng phân số tối giản a/b)

• A. x = 15/4

 \(\Large 4 + x +\dfrac{3}{4}\) =  \(\Large\dfrac{17}{2}\)

 \(\Large  x + \dfrac{3}{4}\) =  \(\Large\dfrac{17}{2}\) - 4

 x + \(\Large\dfrac{3}{4}\) =  \(\Large\dfrac{17}{2}\) - \(\Large\dfrac{8}{2}\)

\(\Large  x + \dfrac{3}{4}\) =  \(\Large\dfrac{9}{2}\)

 x  =  \(\Large\dfrac{9}{2}\) -  \(\Large\dfrac{3}{4}\)

 x  =  \(\Large\dfrac{18}{4}\) -  \(\Large\dfrac{3}{4}\)

 x  =  \(\Large\dfrac{15}{4}\)