Question 67168
Okay. This is another perimeter problem.

To solve this, let's express length and width as variable equations:
Length=2x+10
Width=x

That means two times the length plus two times the width should be the perimeter, which in this case is 80.

In equation format, this would mean:

{{{2(2x+10)+2x=80}}}

Simplified: (factor it out)
{{{4x+20+2x=80}}}

Simplified: (combine like terms)
{{{6x+20=80}}}

Simplified: (isolate variables)
{{{6x=60}}}

Simplified: (simplify)
{{{x=10}}}

That means:
{{{width=10}}} and {{{length=width*2+10}}}, which simplifies to {{{length=30}}}.

I hope that helps. :)