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54 + 560 + 90 = 704
90-54
560
36 + 54 = 90
x - 54 = 36x = 90
90 + 90 + 60 = 240
390
It is 90+90 = 180
56 + 34 = 90
It is the same as 54 plus 36 and both expressions add to 90
6 + 90 = 96
69 + 21 = 90
560 decreased by 90 percent = 56