Work out the value of x

Step-by-step explanation:

4x+5x=180 (allied angles)

9x=180

x=180/9

x=20

4 times 18 is 72. 

So. going from there

The length is 3 times the width. subtract 3 since this is the new and not the original. you have 15

and the width is diminished by one so you have to add one.

the original dimensions is 5 for the width and 15 for the length. 

Hope this helped :)