exam Maths Puzzle Numerical Ability

Hi i need exactly step by step solution in this word problem,and check it.thanks

The sum of the digits of the two-digits number is 3.The tens digits is one more than the unit digit.Find the numbers.

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exam Other Question
Elaluate the formula I=PRT for P= 2500, r=3/50, and T= 1 1/2 Given: f(x)= 7-2x and g(x)= 2x^2-1, find (f-g)(x) and (f*g)(x).


Thank you for you help!
Matt