Question

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Answer 1

Respuesta:

Las respuestas son:

A = 2.5

B = 4.5

C = 6.5

Explicación paso a paso:

a + b = 7

b + c = 11

c + a = 9

a + b = 7

b = 7 - a

b + c = 11

7 - a + c = 11

- a + c = 11 - 7

- a + c = 4

c = 4 + a

c + a = 9

4 + a + a = 9

2a = 9 - 4

2a = 5

a = 5 ÷ 2

a = 2.5

a + b = 7

2.5 + b = 7

b = 7 - 2.5

b = 4.5

b + c = 11

4.5 + c = 11

c = 11 - 4.5

c = 6.5

Comprobación

A + B = 7

2.5 + 4.5 = 7

7 = 7

B + C = 11

4.5 + 6.5 = 11

11 = 11

C + A = 9

6.5 + 2.5 = 9

9 = 9