... 24 . 42 + 24 .27 = 24 (3 1 + 42 + 27 ) = 24 .100 = 24 00 b, 36 .28 + 36. 82 + 64 .69 + 64 .41 = 36 (2 8 + 82) + 64 (6 9 + 41) = 36 110 + 64 110 = 11 0( 36 + 64 ) = 110 100 = 11000 Bi 58 n! = 1 .2. 3 n 5! = 1 .2. 3.4.5 ... 22 = 20 b, 36; 60 ; 72 36 = 22 32 60 = 22 72 = 23 32 ƯCLN( 36; 60 ; 72) = 22 = 12 quan h 13, 20 Quan h 28 , 39, 35 c, ƯCLN(13, 30) = d, 28 ; 39; 35 28 = 22 39 = 13 35 = ƯCLN (2 8 ; 39; 35) = Bài ... + = 18 7(x - 3) = 14 (x - 3) =2 x =5 3x + 15 = 33 3x = 18 3x = 3x = 32 x =3 2x + 2x+3 = 5 76 2x + 2x 23 = 5 76 2x(1 + 23 ) = 5 76 2x = 5 76 2x = 64 x = 26 x = (9 - x)3 = 21 6 (9 x)3 = 63 9- x...