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• What is a+b =78, b+c = 121, and a+c =125, what is...

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

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

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