Реши уравнение

(3 1/7x + 5 1/2) * 1 7/11 = 21

(3 1/7x + 5 1/2) * 1 7/11 = 21

(22/7 х+11/2) * 18/11=21

(22/7 х*18/11) + (18/11*11/2) = 21

((22*18) / (7*11)) х + ((18*11) / 11*2)) = 21

(396/77) х + (198/22) = 21

(396/77) х+9=21

(396/77) х=12

х=12 / (396/77)

х=77/33

х=2 11/33