2x+1=5x-20
you want to find the x value so you want to isolate x to do this you have to subtract 2x on both sides. After you have accomplished this you add 20 on both sides once again and then you divide what your answer from what you added by three.
2x+1=5x-20
-2x -2x
________
1=3x-20
+20 +20
_______
21/3=3x/3
7=x
Answer:

Step-by-step explanation:
Volume of a Rectangular Prism is :

For,


The Height of the rectangular prism is: 
Answer:
it's b
Step-by-step explanation:
1 and -1 are opposites
Answer:
A and C
Step-by-step explanation: