Question

afla 2nr stiind ca suma lor este30 si daca adunamde doua oriprimul numar cu de cinci ori al doilea numar obtinem114

Answer 1

a+b=30 =>a=30-b
2a+5b=114
2(30-b)+5b=114
60-2b+5b=114
3b=114-60
3b=54 =>b=18 =>a=12

Answer 2

      a +     b    = 30  l  x 2

2 × a + 5 × b = 114

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2 × a + 5 × b = 114

2 × a + 2 × b = 60

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/             3 × b = 54

               b = 54 : 3

                b  = 18 → al doilea numar

30 - 18 = 12 ( a )  → primul numar