8640×506/720-(87092+176068)/645=8640×
×506/720-263160/645=4371840/720-263160/
/645=6072-263160/645=6072-408=5664
1) 18:6=3 6*3=18 3*6=18 18;3=6. 2) 42:6=7 6*7=42 7*6=42 42:7=6
1)200(x-5)=100(x+1)-500
200х-1000=100х+100-500
100х=600
х=6
2)5(3x+6)-4(2x-3)=5x-8
15х+30-8х-12=5х-8
2х=-26
х=-13
24/24, 23/24, 22/24, 20/24, 16/24, 15/24, 12/24, 10/24, 9/24