720 : [ 41 - ( 56 : x - 5 ) ] = 40
41 - ( 56 : x - 5 ) = 720 : 40
41 - ( 56 : x - 5 ) = 18
56 : x - 5 = 41 - 18
56 : x - 5 = 23
56 : x = 23 + 5
56 : x = 28
x = 56 : 28
x = 2
720 : [41 - ( 56 :x -5 )] =23.5
720:[41-(56:x-5)]=40
41-(56:x-5)=720:40
41-(56:x-5)=18
56:x-5=41-18
56:x-5=23
56:x=23+5
56:x=28
x=56:28
x=2