Răspuns :
3. y=7x/3, 2x = 82 - 5*7x/3, 6x = 246 - 35x, 41x = 246, x=6,y=7*6/3=14
2. a/b = 7/9, a-b = -6, a-b / b = 7-9 / 9, -6/b = -2/9, b= 54/2=27,
a=b-6=21
1 in poza.
3. y=7x/3, 2x = 82 - 5*7x/3, 6x = 246 - 35x, 41x = 246, x=6,y=7*6/3=14
2. a/b = 7/9, a-b = -6, a-b / b = 7-9 / 9, -6/b = -2/9, b= 54/2=27,
a=b-6=21
1 in poza.