Question

Пожалуйста помогите срочно!!!!!!!!!

Answer 1

1. а) 5/2 + 5/3 - 19/6 = 15/6 + 10/6 - 19/6 = 6/6 = 1

б) 19/30 - 3/10 + 9/20 = 38/60 - 18/60 + 27/60 = 20+27/60 =  47/60

в) 14/3 : 2/3 - 1 : 7/2 = 14/3 * 3/2 - 1 * 2/7 = 7 - 2/7 = 49-2/7 =  47/7

2. а) х = 26/9 + 7/6

х = 52/18 +  21/18 = 73/18

б) 5/6х * 42 + 1/7х * 42 = 82

5х * 7 + 1х * 6 = 82

35х + 6х = 82

41х = 82

х = 2

3. а) 8/3а - 7/6а = 16/6а - 7/6а = 9/6а (сократим на 3) = 3/2а

3/2 *  2/3 = 1

б) 29/4 - а - 7/3

87/12 - 28/12 - а = 59/12 - а

59/12 - 5/2 = 59/12 - 30/12 = 29/12