tolong ya kakak2 yg baik hati

Mapel : Matematika
Bab : Pecahan

2) 2/7 = a/6
       a = 2 x 6 / 7
       a = 12 / 7
       a = 1,71

2/7 = 1,71/6

3) 8/9 = 72/a
       a = 72 x 9 / 8
       a = 9 x 9
       a = 81

8/9 = 72/81

4) 8/5 - 1
   = 8/5 - 5/5
   = 3/5

5) 3/7 + 3/14 - 1/2
   = 6/14 + 3/14 - 7/14
   = 9/14 - 7/14
   = 2/14
   = 1/7

1. 2/7 = x/6
7x= 12
x = 12/7
x = 1.71
2. 8/9 = 72/x
x= 72x9/8
x = 81
3. 8/5-1 = 8/5- 5/5
=(8-5)/5
=3/5
4. 3/7 + 3/14 -1/2 = 6/14 + 3/14 - 7/14
=(6+3+7)/14
=16/14
=8/7