Question

буду очень благодарна, если решите!!))

Answer 1

$\frac{y+c}{c}\cdot \Big (\frac{c}{y}+\frac{c}{y+c}\Big )=\frac{y+c}{c}\cdot \frac{c(y+c)+cy}{y(y+c)}=\frac{y+c}{c}\cdot \frac{2cy+c^2}{y(y+c)}=\frac{c(2y+c)}{cy}=\frac{2y+c}{y}$

Answer 2

$\frac{y+c}{c} *(\frac{c}{y} +\frac{c}{y+c} )=\frac{y+c}{c} *(\frac{c(y+c)}{y(y+c)} +\frac{yc}{y(y+c)}) =\frac{y+c}{c} *\frac{c(y+c)+yc}{y(y+c)} =\frac{c(y+c)+yc}{yc}=\frac{2yc+c^{2} }{yc} =\frac{c(2y+c) }{yc} =\frac{2y+c}{y}$