Add like terms. "Like terms" are those with the same constellation of variables.
.. terms with variable x: 5x +3x = (5 +3)x = 8x
.. terms with no variable: -9 -20 = -29
The simplified form is 8x -29.
Answer:
The length of the case is 17 inches.
Step-by-step explanation:
A flute case is shaped like a rectangular prism with dimensions:
- height = 5 inches;
- width = 3 inches;
- length = x inches.
The volume of the case is 255 cubic inches.
Use formula for the volume of the rectangular prism:

Thus,

The length of the case is 17 inches.
12 I have to write 20 characters sorry don’t read this please
There is no solution because when you distribute the 6 on the right side you get
6x+18
So the equation is
6x-9=6x+18
This is unsolvable because x must be the same on both sides, so there are no solutions