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9-136.

Write an expression for the unlabeled portion of the segment in each diagram.

  1. Line segment, labeled x,  with 2 unequal sections, left section labeled, 2, right section labeled, question mark.

    We see that is the length of the entire line segment. Can we subtract something from  to find the missing length?

  1. Line segment, labeled 5,  with 2 unequal sections, left section labeled, question mark, right section labeled, x.