7 + 5(x - 3) = 22
7 + 5x - 15 = 22 (Distributing)
7+ 5x = 22 + 15 ( Adding 15 on both sides of the equation)
5x = 22 + 15 - 7 (Subtracting 7 on both sides of the equation)
5x = 30 (Adding and subtracting)
x = 30 / 5 (Dividing on both sides by 15)
x = 6
The answer is the option C.