Question

5/7 (0,27 - 1,4x) - 4/9 (0,36 - 4,5x) = 1

Answer 1

Раскрываем скобки
1,35/7-x-1,44/9+2*x=1⇒1,35/7-1,44/9+x=1⇒x+(1,35*9-1,44*7)/63=x+2,07/63=1⇒x=1-2,07/63=60,93/63.

Ответ: х=60,93/63.