Помогите очень срочно

а) $(3*9+2)/9 + (4*6+1)/6 -(1*27+8)/27 = 29/9 + 25/6 - 35/27 = 29*6/54 + 25*9/54 - 35*2/54 = 174/54 + 225/54 - 70/54 = 469/54 = 8*37/54$

б) $(11*21)/21 - (6*3+2)*7/21 - (3*7+5)*3/21 = (231-20-26)/21 = 185/21 = 8* 17/21$

$(106/21 -2*1/3)-(2*1/3 -12/7) =(106-49)/21 - (49-36)/21 = 44/21 = 2* 2/21$

2*1/3" alt="2 * 2/21 > 2*1/3" align="absmiddle" class="latex-formula">

-x= (3-26+13)/24

-x=-5/6

x=5/6" alt=" 13/6 - x - 13/12 = 1/4

-x= (3-26+13)/24

-x=-5/6

x=5/6" align="absmiddle" class="latex-formula">

б) $(8*3+1)/3 - ((5*15-2)/15 - x) = (3*9+2)/9\\25/3 - 73/15 + x = 29/9\\x = (-25*15+73*3+29*5)/45\\x = -11/45$