Ответ:
Пошаговое объяснение:
3 . a) 11x - 9 = 4x + 26 ; б) 6x + ( 3x - 2 ) = 16 ;
11x - 4x = 26 + 9 ; 6x + 3x - 2 = 16 ;
7x = 35 ; 9x = 16 + 2 ;
x = 5 ; 9x = 18 ; x = 2 ;
в) 7x - 5( 2x + 1 ) = 5x + 19 ;
7x - 10x - 5 = 5x + 19 ;
7x - 10x - 5x = 19 + 5 ;
- 8x = 24 ;
x = 24 : (- 8 ) ;
x = - 3 .
4 . б ) ( 2x - 3 )/3 - ( x + 2 )/4 = 5/12 ;│X 12
4( 2x - 3 ) - 3( x + 2 ) = 5 ;
8x - 12 - 3x - 6 = 5 ;
8x - 3x = 12 + 5 + 6 ;
5x = 23 ;
x = 23 : 5 ;
x = 4,6 .
4 . a) Рішати так само .
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Answers & Comments
Ответ:
Пошаговое объяснение:
3 . a) 11x - 9 = 4x + 26 ; б) 6x + ( 3x - 2 ) = 16 ;
11x - 4x = 26 + 9 ; 6x + 3x - 2 = 16 ;
7x = 35 ; 9x = 16 + 2 ;
x = 5 ; 9x = 18 ; x = 2 ;
в) 7x - 5( 2x + 1 ) = 5x + 19 ;
7x - 10x - 5 = 5x + 19 ;
7x - 10x - 5x = 19 + 5 ;
- 8x = 24 ;
x = 24 : (- 8 ) ;
x = - 3 .
4 . б ) ( 2x - 3 )/3 - ( x + 2 )/4 = 5/12 ;│X 12
4( 2x - 3 ) - 3( x + 2 ) = 5 ;
8x - 12 - 3x - 6 = 5 ;
8x - 3x = 12 + 5 + 6 ;
5x = 23 ;
x = 23 : 5 ;
x = 4,6 .
4 . a) Рішати так само .