Solve the literal equation for x. s=2r+3x

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

I'll give brainliest if you answer right : )

Which of the following statement about pascal's triangle are true?