Add :- $a + b - 3, b - a + 3, a - b + 3$

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Solution

To add $a + b - 3, b - a + 3, a - b + 3$ :
On combining the like terms and adding them we get
$= a + b - 3 + b - a + 3 + a - b + 3 = (a - a + a) + (b + b - b) - 3 + 3 + 3 = a + b + 3$
Hence, on adding $a + b - 3, b - a + 3, a - b + 3$ we get $a + b + 3$ .

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