= 2㏒ 3-1/2㏒ 5+㏒ 50/10=
3 5 5
=2·1-1/2·1+1=2,5
6/1=6
6/2=3
6/3=2
6/6=1
5/1=5
5/5=1
8/1=8
8/2=4
8/4=2
8/8=1
12/1=12
12/2=6
12/3=4
12/4=3
12/6=2
12/12=1
5/7*(-2,19)=-5/7* 219/100=-5*219/7*100=-219/7*20=--219/140=-1 79/140
10 - 3(x - 3) = 27 + x
10 - 3x + 9 = 27 + x
3x + x = 10 - 27 + 9
4x = -8
x = -2