Odpowiedzi

2009-04-20T21:10:33+02:00
3/b=5/b+12

3b+36=5b
36=2b/:2
b=18 =)
2009-04-20T21:12:11+02:00
3/b=5/(b+12)
3*(b+12)=5b
3b+36=5b
2b=36
b=18
2009-04-20T21:12:53+02:00
3/b = 5/12+b
15/3b= 15/3(12 + b)

3b = 3(12 + b)
3b = 36 + b
2b = 36 /÷2
b = 18