Ответ:
( x - 1 ) / ( 5 - x ) = 2/9
x ≠ 5
9( x - 1 ) = 2( 5 - x )
9x - 9 = 10 - 2x
11x = 19
x = 19/11
x = 1 8/11
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Ответ:
( x - 1 ) / ( 5 - x ) = 2/9
x ≠ 5
9( x - 1 ) = 2( 5 - x )
9x - 9 = 10 - 2x
11x = 19
x = 19/11
x = 1 8/11