Question

1. 2(n - 7) + 3 = 9

Explanation:

Step1: Subtract 3 from both sides

$2(n - 7) + 3 - 3 = 9 - 3$
Simplify to get $2(n - 7) = 6$

Step2: Divide both sides by 2

$\frac{2(n - 7)}{2} = \frac{6}{2}$
Simplify to get $n - 7 = 3$

Step3: Add 7 to both sides

$n - 7 + 7 = 3 + 7$
Simplify to get $n = 10$

Answer:

$n = 10$