Simplify (a+b)+(a-b)

$(a + b) + (a - b)$

Step 1

Remove parentheses.

$a + b + a - b$

Step 2

Combine the opposite terms in $a + b + a - b$ .

Subtract $b$ from $b$ .

$a + a + 0$

Add $a + a$ and $0$ .

$a + a$

$a + a$

Step 3

Add $a$ and $a$ .

$2 a$

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