Question

\(\frac{13}{15}\)-(\(\frac{13}{21}\)+x)\(\times\)\(\frac{7}{12}\)=\(\frac{7}{10}\)

tim x nha

ai giai dc tui cho 5 k 

Answer 1

\(\Rightarrow\left(\frac{13}{21}+x\right).\frac{7}{12}=\frac{13}{15}-\frac{7}{10}\)

\(\Rightarrow\left(\frac{13}{21}+x\right).\frac{7}{12}=\frac{1}{6}\)

\(\Rightarrow\frac{13}{21}+x=\frac{1}{6}.\frac{12}{7}=\frac{2}{7}\)

\(\Rightarrow x=\frac{2}{7}-\frac{13}{21}=\frac{-1}{3}\)

Answer 2

giải chi tiết nha

Answer 3

\(\Rightarrow\frac{13}{15}-\left(\frac{13}{21}+x\right)=\frac{6}{5}\)

\(\Rightarrow\left(\frac{13}{21}+x\right)=\frac{13}{15}-\frac{6}{5}=-\frac{1}{3}\)

\(\Rightarrow x=-\frac{1}{3}-\frac{13}{21}=-\frac{20}{21}\)

Answer 4

\(\Rightarrow\left(\frac{13}{21}+x\right)\times\frac{7}{12}=\frac{13}{15}-\frac{7}{10}\)

\(\Rightarrow\frac{13}{21}+x=\frac{1}{6}:\frac{7}{12}\)

\(\Rightarrow x=\frac{13}{21}-\frac{2}{7}\)

\(\Rightarrow x=\frac{1}{3}\)

Answer 5

\(\frac{13}{15}-\left(\frac{13}{21}+x\right)\times\frac{7}{12}=\frac{7}{10}\)

\(\left(\frac{13}{15}+x\right)\times\frac{7}{12}=\frac{13}{15}-\frac{7}{10}\)

\(\left(\frac{13}{15}+x\right)\times\frac{7}{12}=\frac{1}{6}\)

\(\frac{13}{15}+x=\frac{1}{6}:\frac{7}{12}\)

\(\frac{13}{15}+x=\frac{2}{7}\)

\(x=\frac{2}{7}-\frac{13}{15}\)

\(x=\frac{-61}{105}\)