book Maths Puzzle Numerical Ability

The sum of two numbers is 25. Twelve less than four times one of the numbers is 16 more than twice the other number. Find both numbers.

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The answer is 12,13
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book Other Question

This is called a Literal Equation.
Solve (x+7)(y+4)=5 for x in the form x=ay+b/y+c A roast was cooked at 325 �F in the oven for 4 hours. The internal temperature rose from 32 �F to 145 �F. What was the average rise in temperature per hour?