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6a=36
a=36/6=6
b) 8/12 =b/b+4
8b+32=12b
32=12b-8b
32=4b
b=8
c)8/c+8=6/9
6c+48=72
6c=24
c=4
d)d/d+6=4/12
12d =4d+24
12d-4d=24
8d=24
d=3
(kali silang)
36=6a
a= 6
- 8/12= b/ b+4
(kali silang)
8b+32= 12b
32= 4b
b= 8
- 6/9= 8/8+c
(kali silang)
48+6c= 72
6c= 24
c=4
- 4/12= d/d+6
4d+24= 12d
24= 8d
d= 3