Question 809867
I'm gonna go on a limb and say u meant:
 {{{(3x/20)-(17x/20)}}}
since they have the same denominator it can also look like this:
{{{(3x-17x)/20)}}}
now simple add the like terms 3-17=-14
{{{(-14x)/20)}}}
14 and 20 are both even numbers so they are both divisible by 2 so divide 2 from 14 and 20
{{{highlight_green((-7x)/10))}}}