Question

\(A,\dfrac{x}{y}+\dfrac{3}{8}=\dfrac{1}{2}\) 

\(B,\)\(\dfrac{x}{y}-\dfrac{4}{5}=\dfrac{2}{3}\) 

\(C,\dfrac{5}{8}\) x \(\dfrac{x}{y}=\dfrac{5}{12}\) 

\(D,\dfrac{x}{y}:\dfrac{2}{9}=\dfrac{3}{8}\) 

Answer 1

`a, x/y = 1/2 - 3/8`

`x/y = 1/8`

`-> x = 1k, y = 8k`.

`b, x/y = 2/3 + 4/5`

`x/y = 22/15`

`-> x = 22k,y=15k`

`c, 5/8 xx x/y = 5/12`

`x/y = 5/12 : 5/8`

`x/y = 2/3`

`x = 2k, y =3k`

`d, x/y = 3/8 xx 2/9`

`x/y = 1/12`

`-> x = k, y = 12k`.

Answer 2

\(a,\dfrac{x}{y}=\dfrac{1}{2}-\dfrac{3}{8}\)

\(\dfrac{x}{y}=\dfrac{1}{8}\)

\(b,\dfrac{x}{y}=\dfrac{2}{3}+\dfrac{4}{5}\)

\(\dfrac{x}{y}=\dfrac{22}{15}\)

\(c,\dfrac{x}{y}=\dfrac{5}{12}:\dfrac{5}{8}\)

\(\dfrac{x}{y}=\dfrac{5}{12}\times\dfrac{8}{5}\)

\(\dfrac{x}{y}=\dfrac{2}{3}\)

\(d,\dfrac{x}{y}=\dfrac{3}{8}\times\dfrac{2}{9}\)

\(\dfrac{x}{y}=\dfrac{1}{12}\)

Answer 3

A\(\dfrac{x}{y}+\dfrac{3}{8}=\dfrac{1}{2}\)

\(\dfrac{x}{y}=\dfrac{1}{2}-\dfrac{3}{8}\)

\(\dfrac{x}{y}=\dfrac{1}{8}\)

B\(\dfrac{x}{y}-\dfrac{4}{5}=\dfrac{2}{3}\)

\(\dfrac{x}{y}=\dfrac{2}{3}+\dfrac{4}{5}\)

\(\dfrac{x}{y}=\dfrac{22}{15}\)

C\(\dfrac{5}{8}x\dfrac{x}{y}=\dfrac{5}{12}\)

\(\dfrac{x}{y}=\dfrac{5}{12}:\dfrac{5}{8}\)

\(\dfrac{x}{y}=\dfrac{2}{3}\)

D\(\dfrac{x}{y}:\dfrac{2}{9}=\dfrac{3}{8}\)

\(\dfrac{x}{y}=\dfrac{3}{8}x\dfrac{2}{9}\)

\(\dfrac{x}{y}=\dfrac{1}{12}\)