A number has two digits. The digit at tens place is four times than the units place .If 54 is subtracted from the number ,The digits are reversed . Find the number?
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let the two digit no be 10x + y
according to the question:
4x = y
also,
(10x + y ) - 54 = 10y + x
on solving this
9x - 9y = 54
taking 9 common:
9( x-y) = 54
substituting 4x = y
x-4x= 6
-3x = 6
x= -2
y = 8
so the no is 28 or -28
Hope it will help you out
according to the question:
4x = y
also,
(10x + y ) - 54 = 10y + x
on solving this
9x - 9y = 54
taking 9 common:
9( x-y) = 54
substituting 4x = y
x-4x= 6
-3x = 6
x= -2
y = 8
so the no is 28 or -28
Hope it will help you out
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