Question

Answer 1

4:D

Answer 2

\(=1:x=\dfrac{1}{2}\\ x=1:\dfrac{1}{2}\\ x=2\)

Answer 3

\(x=6\)

Answer 4

2

Answer 5

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

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

        \(\dfrac{3}{5}\div x=\dfrac{1}{10}\)

               \(x=\dfrac{3}{5}\div\dfrac{1}{10}\)

               \(x=6\)

        

Answer 6

6