Question 946986
Pure text:
4/(x+3)/(1/x+3)


The left three curly braces, the expression, the right three curly braces:
{{{4/(x+3)/(1/x+3)}}}
The triple curly braces are the rendering tags.


I wanted to say:  "Decide which is your main fraction bar to start.  Suggestion is, pick the second one.", but the rendering is not letting it appear the way I want it to appear.  Multiply the entire complex fraction by {{{(x/x)}}}, which is useable as a lowest common denominator  (for a first step).



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That first expression is really supposed to look like this:
{{{(4/(x+3))/(1/x+3)}}}



Mulpiliciation by 1:


{{{((4/(x+3))/(1/x+3))(x/x)}}}


{{{((4x)/(x+3))/(1+3x)}}}


You can formally understand the next step as  multiplication by {{{1=(1/(1+3x))/(1/(1+3x))}}}  which will give you, with a little adjustment,  {{{highlight_green((4x)/((x+3)(3x+1)))}}}; and you can then finish multiplication within the denominator.