Question

Rezolvati in Z ecuatia:
$( \frac{5}{3}-4)^2: \frac{7}{9}-x=-1$
-la mine a dat ca x=8 (-x=-8 deci x=8)

Answer 1

$( \frac{5}{3}-4)^2: \frac{7}{9}-x=-1$

$( \frac{25}{9}-2*4* \frac{5}{3}+16) : \frac{7}{9} -x = -1$

$( \frac{25}{9}-\frac{40}{3}+16) : \frac{7}{9} -x = -1$

$( \frac{25}{9}-\frac{120}{9}+ \frac{144}{9} ) : \frac{7}{9} -x = -1$

$\frac{49}{9} : \frac{7}{9} -x = -1$

$\frac{49}{9} * \frac{9}{7} -x = -1$

7-x=-1
-x= -1 -7 
-x=-8
 x=8

ti-a dat bine, bravo!