Question 506475
simplify if possible : 1-v/v-9-5v-7/9-v
:
I assume the problem is:
{{{((1-v))/((v-9))}}}-{{{((5v-7))/((9-v))}}}
We can make the denominators the same by factoring out -1
{{{((1-v))/((v-9))}}}-{{{((5v-7))/(-1(v-9))}}}
the minus 1 changes the sign to
{{{((1-v))/((v-9))}}}+{{{((5v-7))/((v-9))}}}
Now we can put it over a single denominator, since they are the same. 
Then remove the brackets and combine like terms
{{{((1-v)+(5v-7))/((v-9))}}} = {{{((4v-6))/((v-9))}}}