Question

2 tìm X

14/5 : X = 13/5 - 7/5

1/3 x X + 5/6 x X = 12/5

                              Nhớ giải đầy đủ

                              Ai nhanh đc tích!

Answer 1

a) \(\frac{14}{5}\div x=\frac{13}{5}-\frac{7}{5}\)

\(\frac{14}{5}\div x=\frac{6}{5}\)

\(x=\frac{14}{5}\div\frac{6}{5}\)

\(x=\frac{7}{3}\)

b) \(\frac{1}{3}\cdot x+\frac{5}{6}\cdot x=\frac{12}{5}\)

\(\left(\frac{1}{3}+\frac{5}{6}\right)\cdot x=\frac{12}{5}\)

\(\frac{7}{6}\cdot x=\frac{12}{5}\)

\(x=\frac{12}{5}\div\frac{7}{6}\)

\(x=\frac{72}{35}\)

Answer 2

\(\frac{14}{5}\) :  X = \(\frac{13}{5}\) -  \(\frac{7}{5}\)

\(\frac{14}{5}\): X   =       \(\frac{6}{5}\)

       X         =        \(\frac{14}{5}\) : \(\frac{6}{5}\) ( Tìm số chia)

       X         =              \(\frac{7}{3}\)

\(\frac{1}{3}\) x  X  + \(\frac{5}{6}\) x  X = \(\frac{12}{5}\)

( \(\frac{1}{3}\) + \(\frac{5}{6}\))  x  X = \(\frac{12}{5}\)

      \(\frac{7}{6}\)           x  X  = \(\frac{12}{5}\)

             X                  =  \(\frac{12}{5}\) : \(\frac{7}{6}\) ( Tìm thừa số)

             X                  =          \(\frac{72}{35}\)

Answer 3

14/5 : x = 13/5 - 7/5

14/5 : x = 6/5

         x = 14/5 : 6/5

         x = 14/5 x 5/6

         x = 7/3

b)

1/3 * x + 5/6 * x = 12/5

x * ( 1/3 + 5/6)   = 12/5

x * 2/6 + 5/6      = 12/5

x * 7/6              = 12/5

x                      = 12/5 : 7/6

x                      = 72/35 

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