exam Maths Puzzle Numerical Ability

Comparing Earthquakes:

Two earthquakes differ by 1.0 when measured on the Richter scale. How would the seismographic readings differ at a distance of 100 kilometers from the ep

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Please Help! I don't not know how to solve these problems.
1. A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to what if u have a problem like this one -2y=6+4y how do u change that one into standard form y=mx+b