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Algebra/pre-algebra

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Expert: - 4/15/2009


Question
7m-12=2.5m+2

m= ?

Answer
You can add or subtract the same thing from both sides of an equals sign without changing the results.  So subtract 2.5m from each side to get 4.5m-12 = 2.  Now add 12 to each side to get 4.5m = 14.  
You can also multiply or divide each side by the same thing so divide each side by 4.5 to get m = 3.11

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