Question 662600


{{{3a = 7 - b}}}........1
{{{3a = 5 - b}}}........2
____________________subtract 2 from 1


{{{3a-3a = 7 - b-5-(-b)}}}

{{{0= 7 - b-5+b}}}

{{{0= 7 -5}}}

{{{0= 2}}}...........C. there are no solutions