6y=70-5x
cum x apartine lui n, incepem si iidam valori
pt x=0, 6y=70 y=70/6 nu aprtine N
pt x=1, 6y=70-5=65...y=65/6 y nu aprtine N
x=2..........................y=60/6=10 apartine N , deci e BUN
x=3.........................y=55/6 nu apartine
x=4.........................y=50/6 nu
x=5.........................y=45/6 nu
x=6.........................y=40/6 nu
x=7.........................y =35/6 nu
x=8.........................y=30/6=5 aparine N deci BUN
x=9........................y=25/6 nu
x=10 y=20/6 nu
n o mai lungesc valorile merg din 30 in 30 deci Nu ai e buna nici una ( 15/6, 10/6, 5/6)
pana la
x=14 y=0/6=0 BUN
deci X = {(2, 10) ; (8,5);(14,0)}
