1. The perimeter of a rectangle is 78 cm. The length is 3 greater than twice its width. Find the dimensions.
Divide by 2 to get 39 then since a number is 3 times greater than a different number doubled do 3*2=6 so its six times greater

Question

1.	The perimeter of a rectangle is 78 cm.  The length is 3 greater than twice its width.  Find the dimensions.
Divide by 2 to get 39 then since a number is 3 times greater than a different number doubled do 3*2=6 so its six times greater

anonymous · Answer

draw the rectangle and write an equation. Let w = width. 3 greater than twice width is saying the length is 3 + 2w
|dw:1435372479239:dw|
All the sides add up to the perimeter, which is 78 so this is the equation
$$2w + 2(3+2w)=78$$