Answer:
X=5
Step-by-step explanation:
Simple....
you have:
3x-9=7x+12
To even solve this....isolate the variable your are trying to solve for....
3x-9=7x+12
-3x -3x
-9=4x+12
-9=4x+12
-12 -12
-21=4x
Simplify.....


Thus, your answer.
The correct equation is:

The volume of second cylinder is 256 centimeter cubed
<em><u>Solution:</u></em>
Given that,
One cylinder has a volume that is 8cm less than 7/8 of the volume of a second cylinder
The first cylinder’s volume is 216 centimeter cubed
From given,
Let "x" be the volume of second cylinder
Therefore,
Volume of first cylinder = 7/8 of the volume of a second cylinder - 8


Thus the volume of second cylinder is 256 centimeter cubed
3. Alt. Interior Angles
4. definition of midpoint
F(59)=3x-2
f(59)=3(59)-2
f(59)=177-2
f(59)=175