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If a = 2, b = 3, c = 4 and d = 5, what is the value of 2a + 3b + c2 - d

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In algebra, letters, such as a and b, are used in place of numbers.  If the values of the letters are known then it is important to be able to replace the letters with numbers.
 


If a = 2, b = 3, c = 4 and d = 5, what is the value of 2a + 3b + c<sup>2</sup> - d





 
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