14/x = 7/6
x = (14*6)/7 = (7*2*6)/7 = 2*6 =12
(333+333)*3-3/3=1997 .........
Решим первое неравенство
x^2+7*x+10=0 x1,2=(-7±√(49-40))/2=(7±3)/2 x1=-5 x2=-2
xЄ(-5; -2)
4*х+12>=0 4*x>=-12 x>=-3
xЄ[-3; -2)
1)
у= 1/3 : 1/6
у= 1/3 • 6
у= 2
2)
-х=1/7/4
-х= 1/28
х=-1/28
3)
х=0