Question

[Nguyễn Mai Dung]

a) x + \(\dfrac{\text{1}}{\text{2}}\) = \(\dfrac{\text{5}}{\text{7}}\)

b) x - \(\dfrac{\text{5}}{\text{9}}\) = \(\dfrac{\text{13}}{11}\)

c) x : \(\dfrac{\text{3}}{\text{7}}\) = \(\dfrac{\text{8}}{\text{9}}\)

d) x \(\times\) \(\dfrac{\text{3}}{\text{4}}\) = \(\dfrac{\text{6}}{11}\)

Answer 1

[Bùi Như Quỳnh]

a,  x + \(\dfrac{1}{2}\) = \(\dfrac{5}{7}\)

    x         = \(\dfrac{5}{7}\) - \(\dfrac{1}{2}\)

      x        = \(\dfrac{3}{14}\) 

b, x    -  \(\dfrac{5}{9}\) = \(\dfrac{13}{11}\) 

   x            = \(\dfrac{13}{11}\) + \(\dfrac{5}{9}\)

  x            = \(\dfrac{172}{99}\)

c,  x : \(\dfrac{3}{7}\)   = \(\dfrac{8}{9}\)

           x   = \(\dfrac{8}{9}\)x \(\dfrac{3}{7}\)

           x   = \(\dfrac{8}{21}\)

d,     \(x\) x \(\dfrac{3}{4}\) = \(\dfrac{6}{11}\)

       x          = \(\dfrac{6}{11}\) : \(\dfrac{3}{4}\)

       x         =   \(\dfrac{8}{11}\)