75:{5•6-[6•4:(20-12:n•3)-2]:2}+7=10 ( facem 10-7)
75:{5•6-[6•4:(20-12:n•3)-2]:2}=3 ( facem 75:3)
5•6-[6•4:(20-12:n•3)-2]:2=25 ( facem 5•6, 6•4)
30-[24:(20-12:n•3)-2]:2=25 ( facem 30-25)
[24:(20-12:n•3)-2]:2=5 ( facem 2•5)
24:(20-12:n•3)-2=10 ( facem 10+2)
24:(20-12:n•3)=12 ( facem 24:12)
20-12:n•3=2 ( facem 20-2)
12:n•3=18 ( facem 18:3)
12:n=6 ( facem 12:6)
n=2
Sper că te-am ajutat
