Răspunsuri

  • Utilizator Brainly
2014-06-11T16:43:20+03:00
A-b=28⇒a=28+b

a+b=28x4
a+b=112

28+b+b=112
2b=112-28
2b=84
b=42

a=28+42
a=70

Verificare : 70-42=28
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2014-06-11T16:47:25+03:00
X-y=28        x-y=28      x=28+y          x=28+y  x=28+y    x=28+42   x=70
x+y=28x4   x+y=112    28+y+y=112   2y=84    y=42        y=42        y=42

S=(70,42)
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