Odpowiedzi

2009-11-06T17:38:42+01:00
2009-11-06T17:39:24+01:00
2(a+b) = 15
a = b+5
a+b= 7,5
b + 5 + b = 7,5
2b = 2,5
b = 1,25
a = b + 5 = 6,25
2009-11-06T17:41:16+01:00
15-5x2=15-10=5
5:4=1.25
5+1.25=6.25
a=6.25
b=1.25

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