Răspuns :
3/8-x=1/4
3/8-x=2/8
x=1/8
1/4=2/8, amplificam cu 2
apoi am calculat
3/8-2/8=x
1/8=x
3/8-x=2/8
x=1/8
1/4=2/8, amplificam cu 2
apoi am calculat
3/8-2/8=x
1/8=x
Aduci la același numitor si il elimini: 3-8x=2 si -8x=2-3 -8x=-1 si x= 1/8