Question 916439


The sides of a rectangle are {{{L=xcm}}}  and  {{{W=3cm}}}. 
Its perimeter is {{{P=24cm}}}

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


{{{24cm=2x+2*3cm}}}


{{{24cm-6cm=2x}}}


{{{18cm=2x}}}

{{{9cm=x}}}