Решите неравенство: 2<20-3(x+5)<7x
1) ( 0,5; 3 ); 3) ( 0,5; 1 )
2) ( 1,25; 3 ); 4) ( 0,25; 1 )
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Решите неравенство: 2<20-3(x+5)<7x
1) ( 0,5; 3 ); 3) ( 0,5; 1 )
2) ( 1,25; 3 ); 4) ( 0,25; 1 )
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2<-3x+5<7x
Система:
-3x+5>2
-3x+5<7x
-3x>-3
x<1
-10x<-5
x>0,5
Ответ:(0,5;1)