Answer:
x=14
Step-by-step explanation:
1.subtract 72 from 86
2. add 3 to -2
3. get the X on one side
Answer:

Step-by-step explanation:
we know that
The length of the side, s, of a cube with a surface area, SA is equal to the formula

Step 1
Find the length of the side, s, of a cube with a surface area of 
we have

substitute in the formula


Step 2
Find the length of the side, s, of a cube with a surface area of 
we have

substitute in the formula


Step 3
Find the difference of the length sides
