Answer: 
Step-by-step explanation:
Given
Equation is 
Mila uses the first step as multiplication to make the coefficient of x, 1
Mila maybe have multiplied the whole equation by 2 i.e.

The correct answer is 525seats in the civic theatre.
Answer:
6x+9+2x
Step-by-step explanation:
8x+9
hope it helps uh
16r^2+ 2r -4r
16r^2 - 2r
2r ( 8r -1)