Question

1/9x+7/18x-11/27x=5/2
Прошу,решите побыстрее

Answer 1

$frac{1}{9}x+ frac{7}{18}x- frac{11}{27}x= frac{5}{2}; frac{5}{54}x= frac{5}{2};x=27$

Answer 2

1/9х + 7/18х - 11/27х = 5/2
6/54х + 21/54х - 22/54х = 5/2
5/54х = 5/2
х = 5/2 : 5/54
х = 5/2 * 54/5 = 54/2
х = 27

Пояснения: 
1/9 = (1*6)/(9*6) = 6/54 - доп.множ.6
7/18 = (7*3)/(18*3) = 21/54 - доп.множ.3
11/27 = (11*2)/(27*2) = 22/54 - доп.множ.2

Answer 3

можно было домножить на 2