Question

a+b=36
b+c=21
c+a=29
Find a?
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Answer 1

Answer:

From equation no. 3

a= 29-c....

And, b= 21-c

Put these in a+b

29-c+21-c=36

- 2c= 36-50

So, c= 7

And put in 3rd c+a=29

, a= 29-7

, a= 21

Put in first

b=36-21

b= 15,

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