Question 917985

the perimeter of a rectangle is:{{{P=2L+2W}}}

if the length {{{L}}} of a rectangle is {{{4cm}}} more than five times the width {{{W}}}, then we have

{{{L=5W+4cm}}}

 If the perimeter is {{{P=32cm}}}, then 

{{{2L+2W=32cm}}} ...substitute {{{L}}}

{{{2(5W+4cm)+2W=32cm}}}

{{{10W+8cm+2W=32cm}}}

{{{12W=32cm-8cm}}}

{{{12W=24cm}}}

{{{W=24cm/12}}}

{{{W=2cm}}}

now find {{{L}}}


{{{L=5W+4cm}}}

{{{L=5*2cm+4cm}}}

{{{L=10cm+4cm}}}

{{{L=14cm}}}