need to determine the formula

Question

A word processor determines the width of the body of text on a page.The page is 13 inch wide and has two equal size margins of x inches on each side of the text. Write a formula that gives the width of the text w in terms of the varying width of the margins

Answer 1

Elijah

 

If x = size of margin on each side

and

w = width of text,

then 

w = 13-2x