Question

решите уравнение х-2 1/3=5 2/7

Answer 1

$x = 5 frac{2}{7} + 2 frac{1}{3}$

$x = frac{37}{7} + frac{7}{3}$

$x = frac{37*3}{7*3} + frac{7*7}{3*7}$

$x= frac{111}{21} + frac{49}{21}$

$x = frac{111+49}{21}$

$x= frac{160}{21}$

$x= frac{21*7+13}{21}$

$x = 7 frac{13}{21}$