exam Maths Puzzle Numerical Ability

please help me thank you

one number is 12 more than another.The sum of the smaller number and twice the larger number is 39.Find the larger.

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exam Other Question

Solve the equation: log x + log (x + 48) = 2
I know the answer is 2 from the answers in the back of the book.
I need to know how the solution was solved.
in a jain full of congressmen 34% of the congressmen have misdemeanor indictment, 32% of the congressmen have felony indictments, while 13% hae misdemeanor indictment and felonu ii