Question 1076146
{{{(2x-10)/(3x-21)}}}
---------
{{{(x-5)/(4x-28)}}}
we can see immediately that x cannot equal 7, this would give 0 denominators
invert the dividing fraction and multiply
{{{(2x-10)/(3x-21)}}} * {{{(4x-28)/(x-5)}}}
we can see x cannot equal 5 for the same reason