Răspuns:
3/4:(3/4-²⁾1/2)-4/9=
3/4:(3/4-2/4)-4/9=
3/4:1/4-4/9=
3/4·4/1-4/9=⁹⁾3/1-4/9=27/9-4/9=23/9
amplifici pe 1/2 cu 2 apoi calculezi paranteza
3/4 : ( 3/4 - 2/4) - 4/9
3/4 : 1/4 - 4/9
3/4 * 4/1 (simplifici 4 cu 4) - 4/9
3/1 - 4/9 (amplifici cu 9)
27/9 - 4/9 = 23/9
