Question

if a+b=c and a-b=d then the value of b is​

Answer 1

Step-by-step explanation:

adding both equation we get

2a = c + d

so a = c+d /2

now putting this value in a-b = d

b = a - d

b = c+d -2d /2

b = c-d /2

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Answer 2

Answer:

a+b=c

a-b=d

2b =c-d

2b =a+b+a-b

2b=2a

b=a