8x-2x^3=0
2x(4-x^2)=0
2x=0
x=0
или
4-x^2=0
-x^2=-4
x^2=4
x=+-2
Первое слагаемое - х, второе - 2х
х+2х= 111
3х = 111
х =111 : 3
х = 37
Певрое число 37, второе 37 * 2 = 74
Ответ: 37, 74
11 1/12-x=9 8/9 х=11 1/12 - 9 8/9 = 11 3/36 - 9 32/36 = 1 7/36
77 4/15-x=59 8/9 х= 77 4/15 - 59 8/9 = 77 24/90 - 59 80/90 = 17 34/90 = 17 17/45
X+29 7/8= 51 5/12 х=51 5/12 - 29 7/8 = 51 10/24 - 29 21/24 = 21 13/24
60 3/14-x=41 4/21 х=60 3/14 - 41 4/21 = 60 9/42 -41 8/42= 19 1/42