M•80=539+21
м*80= 560
м=560/80
м=7
450:(r-8)=3
r-8=450/3
r-8=150
r=150+8
r=158
83-29=b•27
b*27=54
b=54/27
b=2
M•80=539+21
м*80= 560
м=560/80
м=7
450:(r-8)=3
r-8=450/3
r-8=150
r=150+8
r=158
83-29=b•27
b*27=54
b=54/27
b=2
м=560/80
м= 7
r-8=450/3
r-8=150
r=150+8
r=158
27b=54
b=54/27
d=2