3/7*5/11= 15/77
3цел 3/5* 11/9= 4цел 2/5
1цел 3/7*21=30цел
6/25*5/18=1/15
1. 2/11×(-5/3)=-10/33
2.-10/33÷7/8=-10/33×8/7=-80/231
1) |y|=7/2
y1=-7/2
y2=7/2
2) |z|=5/2
z1=5/2
z2=-5/2
3) |x|=6
x1=6
x2=-6
4) |x|=9/2
x1=9/2
x2=-9/2
28858/307+999404/49=94+20396=20490
76*155/124+63865/53=95+1205=1300