Question

реши уравнения (4 1/9-а

Answer 1

раскроем скобки 
4/9-4a+8(5/9)=9(2/9)
-4a=9(2/9)-8(5/9)-4/9
-4a=(11-5-4)/9
4a=2/9
a=2/36
a=1/18