Question

Tìm x, biết:

a) x - 2 = \(\dfrac{7}{15}\)

 

b) \(\dfrac{9}{20}\) + x = \(\dfrac{2}{5}\) + \(\dfrac{3}{20}\)

Answer 1

`a, x-2=7/15`

`=>x=7/15 +2`

`=>x= 7/15+ 30/15`

`=>x= 37/15`

`b, 9/20 +x=2/5 +3/20`

`=> 9/20 +x=8/20 +3/20`

`=> 9/20 +x=11/20`

`=>x=11/20-9/20`

`=>x= 2/20=1/10`

Answer 2

x = \(\dfrac{7}{15}\) + 2 = \(\dfrac{37}{15}\) 

x = \(\dfrac{2}{5}\) + \(\dfrac{3}{20}\) - \(\dfrac{9}{20}\) = \(\dfrac{1}{10}\)