A number consists of tow digits whose sum is 9. If 27 is subtracted from the number its digits are reversed. Find the number
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Step-by-step explanation:
Letter. x+y=9.(1) 10x+y-27=10y+X. 9x-9y=27 9(x-y)=27 x-y=3
add(1) and (2)
2x=12
x=12/2
x=6
y=3
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