What is 8r+4=10+2r is it true or false

First, let's solve the equation for r.

8r+4=10+2r
6r=6
r=1

Now that we have the value of r, we can plug it in in order to see if the equation is true or not.

8(1)+4=10+2(1)
12=12

Look at that! Since 12 does indeed equal 12, this equation is true.

The surface area would be 576 because you multiply all the numbers then multiply that number by 6

The difference is 5,100m?