Question

Bài6:Tìm x

a,x+1/4-3/8=7/12

b,x-3/14=5/14+15/21

c,3/10:x=1/10-1/20

d,x:8/25=1/2×4/5

Answer 1

tính trừ bt nha bạn vế thương thì cũng tĩnh ra xong mới tính nha

Answer 2

a, \(x\) + \(\dfrac{1}{4}\) - \(\dfrac{3}{8}\) = \(\dfrac{7}{12}\)

    \(x\) - \(\dfrac{1}{8}\) = \(\dfrac{7}{12}\)

    \(x\)       = \(\dfrac{7}{12}\) + \(\dfrac{1}{8}\)

     \(x\)      = \(\dfrac{17}{24}\)

    

Answer 3

b, \(x\) - \(\dfrac{3}{14}\) = \(\dfrac{5}{14}\) + \(\dfrac{15}{21}\)

    \(x\)  - \(\dfrac{3}{14}\) = \(\dfrac{15}{14}\)

    \(x\)          = \(\dfrac{15}{14}\) + \(\dfrac{3}{14}\)

     \(x\)         = \(\dfrac{9}{7}\)

Answer 4

c, \(\dfrac{3}{10}\) : \(x\) = \(\dfrac{1}{10}\) - \(\dfrac{1}{20}\)

     \(\dfrac{3}{10}\): \(x\) = \(\dfrac{1}{20}\)

            \(x\) = \(\dfrac{3}{10}\) : \(\dfrac{1}{20}\)

            \(x\) = 6

Answer 5

d, \(x\) : \(\dfrac{8}{25}\) = \(\dfrac{1}{2}\) \(\times\) \(\dfrac{4}{5}\)

    \(x\) : \(\dfrac{8}{25}\) = \(\dfrac{2}{5}\)

    \(x\)         =  \(\dfrac{2}{5}\) \(\times\) \(\dfrac{8}{25}\)

    \(x\)         = \(\dfrac{16}{125}\)