exam Maths Puzzle Numerical Ability

The difference of two numbers is three. The larger number is 33 minus twice the smaller number. What are the numbers?

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I could really use some help on this one. I am lost as to how to find the standard form of an ellipse.

Find the standard form of the equation of the ellipse with vertices (-2,3 The Colombia earthquake of 1906 had an intensity of I = 398,107,000. What did it measure on the Richter scale?