Question 495102

the perimeter is {{{P=84m}}}, 

the length {{{L}}} is {{{6m}}} more than {{{twice}}} the width {{{W}}}

{{{L=2W+6m}}}...........1

what is the length {{{L}}} and width {{{W}}}

{{{P=2(L+W)}}}

{{{84m=2(L+W)}}}

{{{84m/2=L+W}}}

{{{42m=L+W}}}........substitute {{{L}}} from 1

{{{42m=2W+6m+W}}}...solve for {{{W}}}


{{{42m-6m=3W}}}

{{{36m=3W}}}

{{{36m/3=W}}}

{{{highlight(12m=W)}}}

{{{L=2W+6m}}}...........1

{{{L=2*12m+6m}}}

{{{L=24m+6m}}}

{{{highlight(L=30m)}}}