Question

Tim x

(3/5.x-2/3.x-x)1/7=-5/21

Answer 1

\(\left(\frac{3}{5}.x-\frac{2}{3}.x-x\right).\frac{1}{7}=\frac{-5}{21}\)

\(\Rightarrow x.\left(\frac{3}{5}-\frac{2}{3}-1\right).\frac{1}{7}=\frac{-5}{21}\)

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Answer 2

Tính nốt cho ๖ۣۜҨž乡тяầи♚νăи♚нùиɢ❦

\(\left(\frac{3}{5}-\frac{2}{3}-1\right)x.\frac{1}{7}=-\frac{5}{21}\)

\(\Rightarrow x.\frac{-16}{15}=-\frac{5}{21}:\frac{1}{7}\)

\(\Rightarrow x.-\frac{16}{15}=-\frac{5}{3}\)

\(\Rightarrow x=-\frac{5}{3}:-\frac{16}{15}\)

\(\Rightarrow x=\frac{25}{16}\)