Question

tìm x:

a) \(x.\frac{4}{5}:2=\frac{6}{7}\) b) \(\frac{6}{5}:x:\frac{5}{4}=\frac{10}{15}\)

 

 

 

Answer 1

a) x.4/5:2=6/7                                                              

    x.4/5=6/7*2

    x.4/5=12/7

    x=12/7:4/5

    x=15/7

Answer 2

b) 6/5:x:5/4=10/15

    6/5:x=10/15*5/4

    6/5:x=5/6

    x=6/5:5/6

    x=36/25

Answer 3

a) \(x.\frac{4}{5}:2=\frac{6}{7}\)

\(x.\frac{4}{5}=\frac{6}{7}.2\)

\(x.\frac{4}{5}=\frac{12}{7}\)

\(x=\frac{12}{7}:\frac{4}{5}\)

\(x=\frac{12}{7}.\frac{5}{4}\)

\(x=\frac{15}{7}\)

b)\(\frac{6}{5}:x:\frac{5}{4}=\frac{10}{15}\)

\(\frac{6}{5}:x:\frac{5}{4}=\frac{2}{3}\)

\(\frac{6}{5}:x=\frac{2}{3}.\frac{5}{4}\)

\(\frac{6}{5}:x=\frac{5}{6}\)

\(x=\frac{6}{5}:\frac{5}{6}\)

\(x=\frac{6}{5}.\frac{6}{5}\)

\(x=\frac{36}{25}\)

Answer 4

\(a,x\cdot\frac{4}{5}\div2=\frac{6}{7}\)

\(x\cdot\frac{4}{5}=\frac{6}{7}\div2\)

\(x\cdot\frac{4}{5}=\frac{3}{7}\)

\(x=\frac{3}{7}\div\frac{4}{5}\)

\(x=\frac{15}{28}\)