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What is a+b =78, b+c = 121, and a+c =125, what is a+b+c equal to?

Answers

  • Réponse publiée par: lhadyclaire

    The answer is 162.

    Step-by-step explanation:

    Given:

    a+b = 78

    b+c = 121

    a+c = 125

    (1)

    a+b = 78

    b = 78 - a

    (2)

    b+c = 121

    78 - a + c = 121

    c = 121 - 78 + a

    c = 43 + a

    (3)

    a+c = 125

    a + 43 + a = 125

    2a = 125 - 43

    2a = 82

    2a/2 = 82/2

    a = 41 ✅

    (4)

    a+c = 125

    41 + c = 125

    c = 125 - 41

    c = 84✅

    (5)

    a+b = 78

    41 + b = 78

    b = 78 - 41

    b = 37✅

    (6)

    a+b+c

    41 + 37 + 84 = 162

  • Réponse publiée par: kurtiee

    162

    Step-by-step explanation:

    if a is 41 and b is 37 it is equal to 78

    41 + 37 = 78

    then subtract 121 by 37 (our b ) ,to get the value of c.

    121 - 37 = 84

    now try to add our a and c.

    41 + 84 = 125

    add our a,b and c.

    41 + 37 + 84 = 162

    so the sum of a,b and c is 162

  • Réponse publiée par: elaineeee

    108

    Step-by-step explanation:

    given

    a+b=78

    b+c=121

    a+c= 125

    method

    {(a+b)+(b+c)+(a+c)}/3

    ={(78)+(121)+(125)}/3

    = (324)/3

    =108

  • Réponse publiée par: hellcrack777

    162

    Step-by-step explanation:

    (78+121+125)/2

    = 162

  • Réponse publiée par: kuanjunjunkuan

    a + b + c = 162 .

    Step-by-step explanation:

    Given :

    a + b = 78

    b + c = 121

    a + c = 125

    Now adding all equation :

    a + b + b + c + a + c = 78 + 121 + 125

    2 ( a + b + c ) = 324

    a + b + c = 162 .

    Hence , a + b + c = 162 .
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What is a+b =78, b+c = 121, and a+c =125, what is a+b+c equal to?...