
Subtract
from both sides.

Square and expand both sides.
9x+36=18x+72
Subtract 9x from both sides.
36=9x+72
Subtract 72 from both sides.
-36=9x
Divide both sides by 9.
-4=x
Your answer would be -4.
I hope this helps :)
The ratio of circumference of circle to its diameyer is the number π ,a mathematical constant, commonly approximated as 3.14159 :)
Answer:
It doesnt affect the equation
Step-by-step explanation:
If it were like this
8-(-9) means posotive minus negative 9