Question

add.
$(5n + 5) + (7n + 5)$

Explanation:

Step1: Group like terms

$(5n + 7n) + (5 + 5)$

Step2: Combine the $n$ terms

$5n + 7n = 12n$

Step3: Combine constant terms

$5 + 5 = 10$

Step4: Combine results

$12n + 10$

Answer:

$12n + 10$