linear equation in 2 variables
Algebra
Level
2
The sum of the digits of a decimal number (which is less than 1) with two decimal places is 8. When the digits are reversed, the new number so obtained is less than the earlier by 0.18. What is the number?
The answer is 0.53.
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1 solution
The number is \overline{ab}
a+b=8 , (10a+b)-(10b+a)=18
a=5,b=3