Question 153557
Let x be the width, then the length is {{{x/2 + 9}}}.
The perimeter = 2*width + 2*length 
= {{{2x + 2(x/2+9)}}}
As the perimeter is 60, we have:
{{{2x + 2(x/2+9)=60}}}
Solving for x, we have
{{{2x + x + 18 = 60}}}
{{{3x+18=60}}}
{{{3x=42}}}
{{{x=14}}}
So 
the width is 14 cm,
the length is {{{x/2 + 9=14/2+9=7+9=16 cm}}}.