Răspuns:
a+2b/5a+4b=6/4
a+2b=6|*2
5a+4b=4
2a+4b=12|*-1
-2a-4b=-12
3a=-8
a=-8/3
-8/3+2b=6
2b=6+8/3=(18+8)/3=26/3=
b=26/3/2=26/5