how do i express each rule as an equation using single letters to stand for the variables and how do identify what each letter represents

Question

anonymous · Answer

the amount of material needed to make the curtains is four square yards per window

anonymous · Answer

first we declare the variables, that is to say we give each a name

anonymous · Answer

y  = material needed ( expresed in square yards)
x  =  number of windows

then we establish the equation:            y  =  4x

anonymous · Answer

well it was a pleasure to help you

anonymous · Answer

Thank u so very much I will be asking for more help