Tìm \(x\) biết:
a) \(x\ :\frac{-3}{5}=\frac{4}{7}\)
b) \(x\ :\ \frac{5}{8}=\frac{-13}{35}\cdot \frac{15}{-39}\)
c) \(\frac{x}{270}=\frac{2}{15}\cdot \frac{-11}{9}\)
d) \(\left( \frac{7}{5}\ +\ x \right):\frac{25}{16}=\frac{-4}{5}\)
A.a)\( \frac{{ - 1}}{{35}}\) b)\( \frac{1}{{56}} \)
c) \( x = - 42 \) d) \( \frac{{ - 13}}{{20}} \)
B.a)\( \frac{{ - 12}}{{35}}\) b)\( \frac{7}{{56}} \)
c) \( x = - 14 \) d) \( \frac{{ 3}}{{20}} \)
C.a)\( \frac{{ - 12}}{{35}}\) b)\( \frac{5}{{56}} \)
c) \( x = - 44 \) d) \( \frac{{ - 53}}{{20}} \)
D.a)\( \frac{{2}}{{35}}\) b)\( \frac{5}{{56}} \)
c) \( x = - 4 \) d) \( \frac{{ - 53}}{{20}} \)
a) \(x\ :\frac{-3}{5}=\frac{4}{7}\)
b) \(x\ :\ \frac{5}{8}=\frac{-13}{35}\cdot \frac{15}{-39}\)
c) \(\frac{x}{270}=\frac{2}{15}\cdot \frac{-11}{9}\)
d) \(\left( \frac{7}{5}\ +\ x \right):\frac{25}{16}=\frac{-4}{5}\)
A.a)\( \frac{{ - 1}}{{35}}\) b)\( \frac{1}{{56}} \)
c) \( x = - 42 \) d) \( \frac{{ - 13}}{{20}} \)
B.a)\( \frac{{ - 12}}{{35}}\) b)\( \frac{7}{{56}} \)
c) \( x = - 14 \) d) \( \frac{{ 3}}{{20}} \)
C.a)\( \frac{{ - 12}}{{35}}\) b)\( \frac{5}{{56}} \)
c) \( x = - 44 \) d) \( \frac{{ - 53}}{{20}} \)
D.a)\( \frac{{2}}{{35}}\) b)\( \frac{5}{{56}} \)
c) \( x = - 4 \) d) \( \frac{{ - 53}}{{20}} \)
Loga
Hóa Học lớp 12
