Question 111493
The perimeter of a rectangle is given by {{{P=2l+2w}}}
:
Let's say that {{{l = 7x+10}}} and
{{{w=3x-4}}}
:
Substituting for l and w:
{{{P=2(7x+10)+2(3x-4)}}}
:
You could quit right here, but you probabaly would want to put the expression in simplest terms.
:
{{{P=14x+20+6x-8}}}
{{{P=20x+12}}}