Сократите дробь:
а) 6a+6b
___
9a
в) ab-ad

abd
д) ax-ay
_
ax+ay
ж) axy+ax
____
ax+ axz

А) $frac{6a+6b}{9a}$ = $frac{6(a+b)}{9a}$ = $frac{2(a+b)}{3a}$
в) $frac{ab-ad}{abd}$ = $frac{a(b-d)}{abd}$ = $frac{b-d}{bd}$
д) $frac{ax-ay}{ax+ay}$ = $frac{a(x-y)}{a(x+y)}$ = $frac{x-y}{x+y}$
ж) $frac{axy+ax}{ax+axz}$ = $frac{ax(y+1)}{ax(1+z)}$ = $frac{y+1}{1+z}$