Question

[Phạm An Bảo]

làm bài guios

Answer 1

[༺༒༻²ᵏ⁸]

\(a,\frac{x}{0,9}=\frac{5}{6}\)

\(\Leftrightarrow6x=5.0,9\)

\(6x=4,5\)

\(6x=\frac{9}{2}\)

\(x=\frac{9}{2}:6\)

\(x=\frac{9}{2}\times\frac{1}{6}\)

\(x=\frac{3}{4}\)

\(b,-\frac{6}{x}=-\frac{9}{15}\)

\(\frac{6}{x}=\frac{9}{15}\)

\(\frac{6}{x}=\frac{3}{5}\)

\(\Leftrightarrow3x=6.5\)

\(3x=30\)

\(x=10\)

Answer 2

[༺༒༻²ᵏ⁸]

\(c,\frac{14}{15}:\frac{9}{10}=x:\frac{3}{7}\)

\(\frac{14}{15}.\frac{10}{9}=x:\frac{3}{7}\)

\(\frac{27}{28}=x:\frac{3}{7}\)

\(x=\frac{27}{28}.\frac{3}{7}\)

\(x=\frac{4}{9}\)

Còn lại bạn tự làm nhé !