Question

X x 2/5-1/2x3/5=3/10               7/20-1/2:X=3/20               7/9:(X-4/9)=1/2

Answer 1

\(\dfrac{2}{5}x-\dfrac{3}{10}=\dfrac{3}{10}\Leftrightarrow\dfrac{2}{5}x=\dfrac{3}{5}\Leftrightarrow x=\dfrac{3}{5}:\dfrac{2}{5}=\dfrac{3}{2}\)

\(\dfrac{1}{2x}=\dfrac{1}{5}\Leftrightarrow x=\dfrac{5}{2}\)

\(x-\dfrac{4}{9}=\dfrac{7}{9}:\dfrac{1}{2}=\dfrac{14}{9}\Leftrightarrow x=\dfrac{14}{9}+\dfrac{4}{9}=2\)

Answer 2

`x xx 2/5 - 1/2 xx 3/5 = 3/10`

`x xx 2/5 - 3/10 = 3/10`

`x xx 2/5 = 3/10 + 3/10`

`x xx 2/5 = 3/5`

`x= 3/5 : 2/5`

`x = 3/5 xx 5/2`

`x= 3/2`

 

`7/20 - 1/2 : x = 3/20`

`1/2 : x = 7/20 - 3/20`

`1/2 : x = 1/5`

`x=1/2 : 1/5`

`x=1/2xx5`

`x=5/2`

 

`7/9 : (x - 4/9) = 1/2`

`x-4/9 = 7/9 : 1/2`

`x-4/9=7/9xx2`

`x-4/9 =14/9`

`x=14/9+4/9`

`x=18/9=2`

Answer 3

`x xx2/5-1/2xx3/5=3/10`

`x xx2/5-3/10=3/10`

`x xx2/5=3/10+3/10`

`x xx2/5=3/5`

`x=3/5:2/5`

`x=3/2`

~~~~~~~~~~~~~~~~~~~~~

`7/20-1/2:x=3/20`

`1/2:x=7/20-3/20`

`1/2:x=1/5`

`x=1/2:1/5`

`x=5/2`

~~~~~~~~~~~~~~~~~~~~~~

`7/9:(x-4/9)=1/2`

`x-4/9=7/9:1/2`

`x-5/9=14/9`

`x=14/9+5/9`

`x=19/9`

Answer 4