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

Answer 1

draw the rectangle and write an equation. Let w = width. 3 greater than twice width is saying the length is 3 + 2w

All the sides add up to the perimeter, which is 78 so this is the equation
\[2w + 2(3+2w)=78\]