daca linia mare de fractie e prima asa se rezolva:
3/2/5=5/2/x
(deci daca egalul e in dreptul lui 3/2=5/2!!)
3/2÷5=5/2÷x
3/2×1/5=5/2×1/x
3/10=5/2x
3×2x=5×10
6x=50
x=50/6 se simplifica cu 2
x=25/3
x/2,5=71/3/0,(3)
x/25/10=71/3/3/9
x÷25/10=71/3÷3/9
x×10/25=71/3×9/3(3cu9 pe diagonala se simplifica)
10x/25=71×3/3
10x/25=71
x=71×25/10 (10 cu 25 se simplifica)
x=71/2
21/3/x=1,5/4
21/3÷x=1,5÷4
21/3×1/x=15/10÷4
21/3x=15/10×1/4
21/3x=15/40
15×3x=21×40
45x=840
x=840/45 se simplifica cu 5
x=168/9 se simplifica cu 3
x=56/3
