420. ?
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421. , , . , , ?
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422. ?
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423. , , ? .
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|
|
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424. ? ? ?
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425. ?
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426. (I) 1400, (Sp) 2200, (Sg) 200. ?
) 600; | ) -600; |
) 0; | ) 2200. |
427. 10 000, 6400, 1600, 2000. :
) 0; | ) 2000; |
) 4800; | ) 3200. |
428. :
) ;
) ;
) ;
) .
429. :
|
|
) ;
) ;
) 1% ;
) .
430. :
) ;
) ;
) ;
) .
431. X Y . X D = 100 5w, S = 60 + 3 w. Y: D = 40 - w, S = 40 + 5 w. :
) X Y;
) Y ;
) , ;
) .
( )
432. , ? .
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433. ? ?
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434. 1980- . , . ? , , ?
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