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2014-10-25T20:56:58+03:00
A+b=80
a/b=7 rest 8
a=7b+8
8b= 80-8
8b=72
b= 72/8
b= 9
a= 7b+8
a= 9*7+8
a= 63+8=71
a+b=71+9=80
2 4 2
2014-10-25T21:04:52+03:00
X+y ≤ 80
x : y = 7 si rest 8
x = 7 y + 8
7y + 8 + y ≤  80
8y ≤  72
y ≤ 9
x ≤ 71

y= 9  x = 71
1 5 1