а) 3/4 * 5/7 = 15/28
б) 1/8 * 3/4 = 3/32
в) 4/7 * 5/6 = 20/42 = 10/21
г) 2/5 * 7/11 = 14/55
д) 1/2 * 4/9 = 4/18 = 2/9
е) 11/12 * 8/9 = 88/108 = 22/27
ж) 2/5 * 3/2 = 3/5
з) 11/15 * 3/5 = 11/5 * 1/5 = 11/25
и) 15/16 * 5/9 = 75/45 = 15/9 = 1целая6/9
•[x²-3y²=24
[x+y=8
•[x=8-y
[64+y²-16y-3y²=24
•[-2y²-16y+40=0
[x=8-y
y²+8y-20=0
y=-10 y=2
•[x=-18. или. [x=6
[y=-10. [y=2
Х+203=915-552
х+203=363
х=363-203
х=160
160+203=915-552
363=663
1)1,44\40*100=3,6-2е число
2)3,6*1,44=5,184 произведение 1е на второе