Question

diferenta a 2 numere este 21,iar raportul lor este 8supra5.Aflati numerele

Answer 1

a-b=21
a/b=8/5, a=8b/5
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8b/5 -b = 21
8b-5b=5*21
3b=5*21
b=5*7=35
a=8*35/5=8*7=56
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verif: 56-35=21 ok.

Answer 2

a - b = 21
a / b = 8 / 5
a = b + 21
b + 21 / b = 8 / 5
5 ( b + 21 ) = 8 b
5 b + 105 b = 8 b
8 b - 5 b = 105
3 b = 105
b = 35
a - 35 = 21
a = 21+ 35
a = 56