А)НОК (4,5)=20 б)НОК (3,11)=33 в)НОК (7,8)=56
4,8,12,16,20,,, 3,6,9,12,15,18,21,24,27,30,33,,, 7,14,21,28,35,42,49,56,,,
5,10,15,20,,, 11,22,33,,, 8,16,24,32,40,48,56,,,
г)НОК (9,10)=90 д)НОК (5,13)=65
9,18,27,36,45,54,63,72,81,90,,, 5,10,15,20,25,30,35,40,45,50,55,60,65,,,
10,20,30,40,50,60,70,80,90,,, 13,26,39,52,65,,,
и т.д
(847+х)-307=694
847+x=694+307
847+x=1001
x=1001-847
x=154
498+(202-x)=564
202-x=564-498
202-x=66
x=202-66
x=136
(762-x)-392=215
762-x=215+392
762-x=607
x=762-607
x=155