Answer: x = 0
Step-by-step explanation:
1 - 3x = 3x + 1
then add 3x on both sides
1 = 6x + 1
then subtract 1 on both sides
0 = 6x
then divide by 6 on both sides
0 = x
so x = 0
The formula for finding the volume of a sphere is 
If 40mm is the radius of the sphere, the volume will be about
mm.
25 is the answer because of the formula adding and subsequently