Question

the perimeter of a rectangle is 28 cm. the length of the rectangle is 2 cm more than twice the width. find the dimension of the rectangle

Answer 1

So start off with the equation Perimeter= 2(length)+2(width). Plug in numbers/variables, and lets use the letter "w" to represent width:
28=2(2w+2)+2w
Divide the entire equation by 2:
14=2w+2+w
14=3w+2
12=3w
w=4
Now thats only your width, so now find your length: 2(4)+2=10
So your length is 10, and width is 4. you can even check:
2(10)+2(4)=20+8=28