<PRE><B>Question 72969</B>
Let x= number of cookies sold
then (145-x)=number of muffins sold

We can now set up a ratio

16 is to 13 as x is to (145-x) and this can be written as follows:

{{{16/13=x/(145-x)}}}  Now we get rid of fractions by cross-multiplying:

{{{16(145-x)=13x}}} get rid of parens
{{{2320-16x=13x}}}  add 16x to both sides
{{{2320-16x+16x=13x+16x}}}
{{{2320=29x}}}  divide both sides by 29
{{{x=80}}}---------------------------------------number of cookies sold
{{{145-x=145-80=65}}} ----number of muffins sold


CK
{{{16/13=80/65}}}  divide right side numerator and denominator by 5
{{{16/13=16/13}}}

Hope this helps----ptaylor

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