HELP WILL MARK BRAINLIEST

(16)(1)                          => identity property of multiplication

2(3+7) = 2(3) + 2(7)    => distributive property

(2+6) + 3 = 2+ (6+3)   => associative property

9+0 = 9                      => identity property of addition

8 x 4 = 4 x 8              => commutative property

C. the variable

Step-by-step explanation:

(8x+9) -5 < The original question.

(8(1)+9) -5 < Replacing the variable.

(8 + 9) -5  < Completing the multiplication.

17 - 5  =     < Doing the addition.

12

x = 1 tells us the "x" or the variable in this equation is a substitute for 1.