Question

X  -\(\frac{2}{7}\)=  \(\frac{X}{21}\)

Answer 1

\(x-\frac{2}{7}=\frac{x}{21}\)

=> \(x-\frac{x}{21}=\frac{2}{7}\)

=> \(x.\left(1-\frac{1}{21}\right)=\frac{2}{7}\)

=> \(x.\frac{20}{21}=\frac{2}{7}\)

=> \(x=\frac{2}{7}:\frac{20}{21}\)

=> \(x=\frac{2}{7}.\frac{21}{20}=\frac{3}{10}\)

Vậy \(x=\frac{3}{10}\)

Answer 2

\(x-\frac{2}{7}=\frac{6}{21}\)

Answer 3

SAO \(\frac{X}{21}\)LAI = \(\frac{6}{21}\)

Answer 4

GIAI RA XEM NAO

Answer 5

nó dễ còn hơn ăn cơm sườn nữa:

=> x - x/21 = 2/7

(21x -x)/21= 2/7

20x /21 = 2/7

x = 21/70

Answer 6

3/10 nha bạn