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The sum of three consecutive integers if the last integer is z.

a.) 3z+3

b.) 3z+6

c.) 3z-3

d.) 3z

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Answers (1)
  1. 2 May, 10:14
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    The last integer is z, then the other two are z-1 and z-2.

    The sum is therefore

    (z-2) + (z-1) + z=3z-3.
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