Ответ:
Объяснение:
7 . x/2 + x/3 = 5 ; │X 6
3x + 2x = 30 ;
5x = 30 ;
x = 6 .
8 . 3( 1 + x )/5 = - 9 ; │X 5
3( 1 + x ) = - 45 ;
x + 1 = - 45 : 3 ;
x + 1 = - 15 ;
x = - 16 .
9 . 2/3 (x - 2 ) + 1/4 ( x + 1 ) = 9 ;│X 12
8( x - 2 ) + 3( x + 1 ) = 108 ;
8x - 16 + 3x + 3 = 108 ;
8x + 3x = 108 + 13 ;
11x = 121 ;
x = 121 : 11 ;
x = 11 .
10 . ( 3 - x )/2 = ( 8 - 5x )/3 ;
3( 3 - x ) = 2( 8 - 5x ) ;
9 - 3x = 16 - 10x ;
10x - 3x = 16 - 9 ;
7x = 7 ;
x = 1 .
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Ответ:
Объяснение:
7 . x/2 + x/3 = 5 ; │X 6
3x + 2x = 30 ;
5x = 30 ;
x = 6 .
8 . 3( 1 + x )/5 = - 9 ; │X 5
3( 1 + x ) = - 45 ;
x + 1 = - 45 : 3 ;
x + 1 = - 15 ;
x = - 16 .
9 . 2/3 (x - 2 ) + 1/4 ( x + 1 ) = 9 ;│X 12
8( x - 2 ) + 3( x + 1 ) = 108 ;
8x - 16 + 3x + 3 = 108 ;
8x + 3x = 108 + 13 ;
11x = 121 ;
x = 121 : 11 ;
x = 11 .
10 . ( 3 - x )/2 = ( 8 - 5x )/3 ;
3( 3 - x ) = 2( 8 - 5x ) ;
9 - 3x = 16 - 10x ;
10x - 3x = 16 - 9 ;
7x = 7 ;
x = 1 .