Question 167519
will call them intergers a and b

{{{a=2b-4}}} eq 1
{{{a+b<=50}}}eq 2

take a's value from eq 1 and plug it into the 2nd equation. 

{(2b-4)+b<+50}}}
{{{3b<=54}}}---->{{{highlight(b<=18)}}}

{{{a<=50-b(18)=32}}}---->{{{highlight(a<=32)}}}