N 1
XY = 323
( X - 2 )*Y = 285
Y = 323/X
( X - 2)*( 323/X ) = 285
323 * ( X - 2 ) = 285X ; X ≠ 0
323X - 646 = 285X
38X = 646
X = 17 ( меньший множитель )
Y = 323 : 17 = 19 ( больший множитель )
ОТВЕТ 19
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N 2
6 ( 1/6 ) + 5 ( 5/12 ) - 3( 4/5 ) - [ 6 ( 1/7 ) - 3 ( 9/28 ) ] + 4 /105 = ?
1) 6 ( 1/7 ) - 3 ( 9/28 ) = 6 ( 4/28 ) - 3 ( 9/28 ) = 5 ( 32/28 ) - 3 ( 9/28 ) = 2 ( 23/28 )
2) 6 ( 1/6 ) + 5 ( 5/12 ) - 3 ( 4/5 ) = 6 ( 10/60 ) + 5 ( 25/60) - 3 ( 48/60 ) =
= 11 ( 35/60 ) - 3 ( 48/60 ) = 10 ( 95/60 ) - 3 ( 48/60 ) = 7 ( 47/60 )
3) 7 ( 47/60 ) - 2 ( 23/28 ) + 4/105 = 7 ( 329/420 ) - 2 ( 345/420 ) + 16/420 =
= 7 ( 345/420 ) - 2 ( 345/420 ) = 5
ОТВЕТ 5