the sum of a digit of a 2 digit no. is 8.If the digits are reversed , the new no. is increased by 18. Find the new no. please answer fast and correctly.. tomorrow is my exam...
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done..........................
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Lolll:
thanks.. but it is from linear equation in one variable
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let the tens digit be x and units digit be y
also, 10x + y = Original Number
x + y = 8-----i
if the digits are reversed
then, tens digit = y
units digit = x
then, 10y + x + 18 = 10x + y
=> 9x-9y= 18
=>x-y = 2-----ii
adding i and ii
2x = 10
=> x = 5
y = 3
therefore, the number is 35
also, 10x + y = Original Number
x + y = 8-----i
if the digits are reversed
then, tens digit = y
units digit = x
then, 10y + x + 18 = 10x + y
=> 9x-9y= 18
=>x-y = 2-----ii
adding i and ii
2x = 10
=> x = 5
y = 3
therefore, the number is 35
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