А) 752 - ( 652 + 96 ) = ( 752 - 652 ) - 96 = 100 - 96 = 4
Б) ( 426 + 279 ) - 279 = 426 + ( 279 - 279 ) = 426
В) 62 + ( 86 + 138 ) + 214 = ( 62 + 138 ) + ( 86 + 214 ) = 200 + 300 = 500
72:2= 36
72:3=24
36 > 24. вот=)
( 9х - 4 ) + ( 15х - 5 ) = 18 - ( 25 - 22х )
9х - 4 + 15х - 5 = 18 - 25 + 22х
24х - 9 = 22х - 7
24х - 22х = 9 - 7
2х = 2
Х = 1