Question

equation in one variable. A NUMBER CONSIST OF TWO DIGIT WHOSE SUM IS 9. IF 27 SUBTRACT FROM THE NUMBER ITS DIGIT ARE REVERSED. FIND THE NUMBER

Answer 1

Let the unit place digit be y
Let the tens place digit be x
Original number=10x+y
ATQ
x+y=9-------eq(i)
10x+y-27=10y+x
9x-9y=27
x-y=3---------eq(ii)
Add new(I)&(ii)
x+y=9
+x-y=3
=2x=12
x=6
Put in ek(I)
6+y=9
y=3

Answer 2

Answer:

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