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The word “increased” indicates the symbol “ + ”.

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The word “equals” indicates the symbol “=”

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Let n represent number.     

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Rewrite the sentence into equation, \ \

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\"\"

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The equation is n + 91 = 37         

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\"\"

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Subtraction property of equality: if a = b, then a \"\" c =  a \"\" b.

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n + 91\"\"91 = 37\"\"91              (Subtract 91 from both sides)

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n = 37\"\"91                              (Additive inverse property: 91\"\"91 = 0)

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   n = \"\"54                                 (Subtract: 37\"\"91 = \"\"54)

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Check:

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To check the solution, substitute n = \"\"54 in original equation.           

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 n + 91 = 37\"\"\"\"54 + 91 = 37     

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 37 = 37                                   (Add: \"\"54 + 91 = 37 )

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Compare the values, the equation is true. The solution is n = \"\"54.

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\"\"

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The value of n = \"\"54.