Question

sum of a+b+c and a-b-c is​

Answer 1

Answer:

2a

since b and c will be cancelled by their negatives

Answer 2

Q) Sum of a+b+c and a-b-c

A) As you know addition (or sum) is associative i.e., order doesn't matter.

We can bring all like terms together, so

(a + b + c) + (a - b - c)

= (a + a) + (b - b) + (c - c)

= 2a + 0 + 0

= 2a

Therefore, your answer is 2a.