SOLUTION: A rectangle with a length of x-4 and a width of 8 has a perimeter of 34. What is the value of x? im not sure if i used the right formula p=2L+2W 34=2(x-4)+2(8) than i came up wi

Algebra ->  Rectangles -> SOLUTION: A rectangle with a length of x-4 and a width of 8 has a perimeter of 34. What is the value of x? im not sure if i used the right formula p=2L+2W 34=2(x-4)+2(8) than i came up wi      Log On


   

Question 235024: A rectangle with a length of x-4 and a width of 8 has a perimeter of 34. What is the value of x?
im not sure if i used the right formula p=2L+2W
34=2(x-4)+2(8)
than i came up with 34=2x-2+16
from there is where i got stuck can u please explain this problem to me i would really appreciate it thank you!
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!

You were right on track up to the point where you said:



But then you said:



when you should have written:



because 2 times x is 2x and 2 times -4 is -8.

Simplify:



Now all you need to do is add -8 to both sides and divide by 2.

John