Answer:
Explanation:
Additive identity is a property that involves the sum of two or more integers in an equation without compromising the equality of the equation.
Given the equation
(5+2)+n = 7+n
We can see that the right hand side of the equation is derived from the left hand had by addition of the values in parenthesis.
Given the right hand side;
= 5+2+n
= (5+2)+n
adding the expression in parenthesis will give;
= 7 + n
Since we added the expression in parenthesis to arrive at the expression at the right hand side, hence additive identity was used in the calculation.