Question

1/3 +x = 2/3+ 1/5

Answer 1

`1/3+x=2/3+1/5`

`\ x=2/3-1/3+1/5`

`\ x=1/3+1/5`

`\ x=5/15+3/15`

`\ x=8/15`

Vậy `x=8/15`

Answer 2

Answer 3

\(\dfrac{1}{3}\) + x = \(\dfrac{2}{3}+\dfrac{1}{5}\)

\(\dfrac{1}{3}\) + x = \(\dfrac{13}{15}\)

       x = \(\dfrac{13}{15}\) - \(\dfrac{1}{3}\)

       x = \(\dfrac{8}{15}\)

Vậy x = \(\dfrac{8}{15}\)

Answer 4

\(a,\)\(\dfrac{1}{3}+x=\dfrac{2}{3}+\dfrac{1}{5}\)\(\Rightarrow x=\dfrac{2}{3}+\dfrac{1}{5}-\dfrac{1}{3}=\dfrac{8}{15}\)

\(b,\)\(\dfrac{3}{7}:x=\dfrac{15}{4}\Rightarrow\dfrac{3}{7x}=\dfrac{15}{4}\Rightarrow x=\dfrac{\dfrac{3.4}{15}}{7}=\dfrac{4}{35}\)