Question

A+B=20 and B+C=30 AND C+A=36 FIND THE VALUE OF A,B,C AND TELL ME HOW​

Answer 1

A+B = 20 ------(1)

B+C = 30 ------(2)

C+A = 36 ------(3)

Add equation 1,2&3.

2A+2B+2C=86

2(A+B+C)= 20+30+36=86

A+(B+C) = 43

A= 43-(B+C)=43-30=13

B= 43-(C+A)=43-36=7

C= 43-(A+B)=43-20= 23

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Answer 2

Answer:

A=13,B=7,C=23

Step-by-step explanation:

adding all equations--

2A+2B+2C=20+30+36

>A+B+C=86/2

>A+B+C=43

SO,

20+C=43(A+B=20)

>C=43-20

>C=23

A+30=43(B+C=30)

>A=43-30

>A=13

B+36=43(C+A=36)

>B=43-36

>B=7