Răspuns :
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
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
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
x : y = 7 si rest 8
x = 7 y + 8
7y + 8 + y ≤ 80
8y ≤ 72
y ≤ 9
x ≤ 71
y= 9 x = 71