(1 5\18 - 2 4 \27) х 5,4x = 9 1\2 + 2 1\2
1 5\18 - 2 4\27 =- (2 4\27 - 1 5\18 ) = - ( 2 8\54 - 1 15\54 ) =
- ( 1 62\54- 1 15\54 ) =-47\54
- 47\54 x 5,4x =- 47\54 x 27\5x = -47\10x =- 4 7\10x
9 1\2 + 2 1\2 = 11 2\2 =12
- 4 7\10x = 12
x = 12 : (-4 7\10)
12 : (-4 7\10 )= 12 :(- 47\10 )= 12 x (-10\47 )= -120\47 =-2 26\47
x = - 2 26\47
5,4 = 5 4\10 = 5 2\5=27\5 4 7\10 = 47\10