Răspuns :
x+3/4=5/18 amplificam pe x cu 4
x/4+3/4=5/18
3+x/4=5/18
3+x=20/18
x=20/18-3 amplificam pe 3 cu 18
x=20/18-54/18
x=34/18
x=17/9
x/4+3/4=5/18
3+x/4=5/18
3+x=20/18
x=20/18-3 amplificam pe 3 cu 18
x=20/18-54/18
x=34/18
x=17/9