Question

nhanh tay giúp mình nha

Answer 1

Tìm X.

X : 5/7 = 15/3

X = 15/3 x 5/7

X = 25/7

9/5 : X = 8/15

X = 9/5 : 8/15

X = 27/8.

Answer 2

\(x:\dfrac{5}{7}=\dfrac{15}{3}\)

\(x:\dfrac{5}{7}=5\)

\(x=5\times\dfrac{5}{7}\)

\(x=\dfrac{25}{7}\)

 

\(\dfrac{9}{5}:x=\dfrac{8}{15}\)

\(x=\dfrac{9}{5}:\dfrac{8}{15}\)

\(x=\dfrac{9}{5}\times\dfrac{15}{8}\)

\(x=\dfrac{27}{8}\)

Answer 3

\(x:\dfrac{5}{7}=\dfrac{15}{3}\)

\(x=\dfrac{15}{3}x\dfrac{5}{7}\)

\(x=\dfrac{15x5}{3x7}\)

\(x=\dfrac{3x5x5}{3x7}\)

\(x=\dfrac{25}{7}\)

\(\dfrac{9}{5}:x=\dfrac{8}{15}\)

\(x=\dfrac{9}{5}:\dfrac{8}{15}\)

\(x=\dfrac{9}{5}x\dfrac{15}{8}\)

\(x=\dfrac{9x5x3}{5x8}\)

\(x=\dfrac{27}{8}\)

Answer 4

x : 5/7 = 15/3

x         = 15/3 x 5/7

x         = 75/21

9/5 : x = 8/15

        x = 9/5 : 8/15

        x = 9/5 : 15/8

        x = 135/40 = rút gọn tự làm nhé em

Answer 5

a)\(x=\dfrac{15}{3}\times\dfrac{5}{7}=\dfrac{75}{21}=\dfrac{25}{7}\)

b)\(x=\dfrac{9}{8}\times\dfrac{15}{8}=\dfrac{135}{64}\)