Ответы и объяснения

2013-03-13T19:01:43+00:00

1)  

 

1 2/3 - 6g = 5/7

5/3 / 5/7 = 6g

7*(5/3) - 3*(5/7) = 6g

35/21 - 15/21 = 6g

-20/21 = 6g

g = - 20/126 = - 10/63

 

 

2)

5e + 4/15 =11/12

e = (4*(4/15) - 5*(11/12))/5

e=(16/60 - 55/60)/5 = -39/60*5 = -13/20*5 = -13/60

 

3) 

 

4/5 a + 1/5 a = 6/7

a = 6/7

 

4)

6 1/6 a - 1 1/6 a = 5/8

37/6 a - 7/6 a = 5/8

30/6 a = 5/8

5a = 5/8

a = 5/40 = 1/8